Component ID?

Hi,

I'm trying to identify a manufacturer and specs for what I believe is
a diode. It's a black cylinder with a silver band surrounding one end,
and its position on the PCB is labeled with a diode symbol and the
identifier CR2 (where 2 is the device manufacturer's arbitrary numeric
id for that component on the PCB). It's about 8.5 mm in diameter and
about 9.5 mm in length.

The component has split in half and I would like to replace it in an
attempt to salvage the device, but the only identifying information on
the component is "LT 9423" on one line, and "22059733" on the next
line. I'm not exactly an electronics hobbyist, so I don't recognize
"LT" as a manufacturer or other sort of designation. Nothing jumped
out at me when I scanned the 100+ pages of diodes in the Digi-Key
catalog.

Can anyone lead me in the right direction? Just FYI, the device is a
windshield wiper control unit for a Chevy pickup truck.

Thanks for your assistance,

Joe

 

[Eeyore]

joe.hodsdon@gmail.com wrote:

Hi,

I'm trying to identify a manufacturer and specs for what I believe is
a diode. It's a black cylinder with a silver band surrounding one end,
and its position on the PCB is labeled with a diode symbol and the
identifier CR2 (where 2 is the device manufacturer's arbitrary numeric
id for that component on the PCB). It's about 8.5 mm in diameter and
about 9.5 mm in length.

That sounds pretty convincingly like a diode for sure.

The component has split in half and I would like to replace it in an
attempt to salvage the device, but the only identifying information on
the component is "LT 9423" on one line, and "22059733" on the next
line. I'm not exactly an electronics hobbyist, so I don't recognize
"LT" as a manufacturer or other sort of designation. Nothing jumped
out at me when I scanned the 100+ pages of diodes in the Digi-Key
catalog.

9423 is almost certainly a date code meaning week 23 of 1994. Does that
sound likely ? None of the other stuff helps.

Can anyone lead me in the right direction? Just FYI, the device is a
windshield wiper control unit for a Chevy pickup truck.

Can you post a picture somewhere, it's very likely to be fairly easily
identifiable from that. I'm suspecting a 6 amp rectifier diode type
myself.

Graham

 

On 3ÔÂ21ČŐ, ĎÂÎç12Ęą31ˇÖ, joe.hods...@gmail.com wrote:

Hi,

I'm trying to identify a manufacturer and specs for what I believe is
a diode. It's a black cylinder with a silver band surrounding one end,
and its position on the PCB is labeled with a diode symbol and the
identifier CR2 (where 2 is the device manufacturer's arbitrary numeric
id for that component on the PCB). It's about 8.5 mm in diameter and
about 9.5 mm in length.

The component has split in half and I would like to replace it in an
attempt to salvage the device, but the only identifying information on
the component is "LT 9423" on one line, and "22059733" on the next
line. I'm not exactly an electronics hobbyist, so I don't recognize
"LT" as a manufacturer or other sort of designation. Nothing jumped
out at me when I scanned the 100+ pages of diodes in the Digi-Key
catalog.

Can anyone lead me in the right direction? Just FYI, the device is a
windshield wiper control unit for a Chevy pickup truck.

Thanks for your assistance,

Joe

Do you want access to China's massive pool of electronic
manufacturers... but lack the time to contact suppliers, negotiate
contracts, arrange shipping or monitor product quality? Don't worry -
Let seriouswholesale deal with all that for you.

*Check out the huge range of Gadgets, MP3 / MP4 Players, Car DVD /
Audio, and Computer Accessories now by visiting the online wholesale
catalog at seriouswholesale. com You'll have peace of mind thanks to
the seriouswholesale Quality Control, 12-month Warranty on all
products, and easy secure payment by credit card through Paypal.

Selling on eBay or your own online store? Send products direct from
our warehouse to your customers using our unique drop-shipping
service. You can profit by selling hundreds of different products,
without holding any of your own inventory! Any questions you have will
be answered by the seriouswholesale English-speaking customer support
team... Their aim is to make your China electronics importing business
easier to run than ever before.

Welcome to http://www.seriouswholesale.com.

seriouswholesale - Buy from the source, profit without the hassle.

- 12 Months Warranty - No minimum order restrictions - Drop-shipping
with no additional fee - Pay by safely by PayPal seriouswholesale
Wholesale Co., Ltd.: Chinas original and best online electronics
wholesaler & drop-shipper: seriouswholesale. com

 

[Paul Herber]

On Fri, 21 Mar 2008 10:04:17 -0700 (PDT), dirskyster@gmail.com wrote:

Do you want

http://www.freetibet.org/

Every post by seriouswholesale is a vote for the Dalai Lama.





--
Regards, Paul Herber, Sandrila Ltd.
http://www.sandrila.co.uk/ http://www.pherber.com/

 

[Franc Zabkar]

On Thu, 20 Mar 2008 21:31:40 -0700 (PDT), joe.hodsdon@gmail.com put
finger to keyboard and composed:

Hi,

I'm trying to identify a manufacturer and specs for what I believe is
a diode. It's a black cylinder with a silver band surrounding one end,
and its position on the PCB is labeled with a diode symbol and the
identifier CR2 (where 2 is the device manufacturer's arbitrary numeric
id for that component on the PCB). It's about 8.5 mm in diameter and
about 9.5 mm in length.

The component has split in half and I would like to replace it in an
attempt to salvage the device, but the only identifying information on
the component is "LT 9423" on one line, and "22059733" on the next
line. I'm not exactly an electronics hobbyist, so I don't recognize
"LT" as a manufacturer or other sort of designation. Nothing jumped
out at me when I scanned the 100+ pages of diodes in the Digi-Key
catalog.

Can anyone lead me in the right direction? Just FYI, the device is a
windshield wiper control unit for a Chevy pickup truck.

Thanks for your assistance,

Joe

FWIW, plugging the number "22059733" into http://www.usbid.com/
suggests that the part is made by LTC which I would normally expect to
be Linear Technology Corp. However, I wouldn't usually associate LTC
with diodes.

The following Estonian (?) discussion talks about an "LT 9636
22059733" diode. This appears to confirm that 9423 is a YYWW date
code:
http://www.elfaelektroonika.ee/foorum/showthread.php?t=30643

Someone mentions a transient voltage suppressor diode (TVS) but I
don't know if that's just a guess or a definite ID. Another person
mentions a 6-10A diode.

FWIW, here is a Chevy wiper/washer wiring diagram:

http://arrc.epnet.com/autoapp/9308VEN/chiltonimages/7000/7921ZGA6L.gif

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

Thanks for the reply, Eeyore.

Yes, a date code of week 23, 1994 sounds perfectly reasonable for a
1995 Chevy. I've posted some pictures of the diode, the PCB, and the
component that it was connected to. They're available at
http://www.thezac.com/wipers/ .

The broken diode was connecting a +12 VDC power source to pin 2 of the
blue component in the last picture. The +12 VDC power source passes
through a 25 amp fuse before coming into the device. The other pins of
the blue component are connected as follows:

Pin 1: One of three terminals on the wiper motor (not the ground
terminal)
Pin 2: The broken diode
Pin 3: Two transistors. I'd have to draw a whole schematic to describe
where these transistors lead.
Pin 4: The cathode terminal of a much smaller (physically) diode that
connects to the same +12 VDC source as the broken diode. This diode
can be seen in the pictures to the right of the label "MIN COATING".
Pin 5: Ground

Don't know if this information provides any insight, but I thought it
couldn't hurt.

Thanks,
Joe



On Mar 21, 1:22 am, Eeyore <rabbitsfriendsandrelati...@hotmail.com>
wrote:

joe.hods...@gmail.com wrote:
Hi,

I'm trying to identify a manufacturer and specs for what I believe is
a diode. It's a black cylinder with a silver band surrounding one end,
and its position on the PCB is labeled with a diode symbol and the
identifier CR2 (where 2 is the device manufacturer's arbitrary numeric
id for that component on the PCB). It's about 8.5 mm in diameter and
about 9.5 mm in length.

That sounds pretty convincingly like a diode for sure.

The component has split in half and I would like to replace it in an
attempt to salvage the device, but the only identifying information on
the component is "LT 9423" on one line, and "22059733" on the next
line. I'm not exactly an electronics hobbyist, so I don't recognize
"LT" as a manufacturer or other sort of designation. Nothing jumped
out at me when I scanned the 100+ pages of diodes in the Digi-Key
catalog.

9423 is almost certainly a date code meaning week 23 of 1994. Does that
sound likely ? None of the other stuff helps.

Can anyone lead me in the right direction? Just FYI, the device is a
windshield wiper control unit for a Chevy pickup truck.

Can you post a picture somewhere, it's very likely to be fairly easily
identifiable from that. I'm suspecting a 6 amp rectifier diode type
myself.

Graham

 

Thanks for the info and wiring diagram. That's more detailed than the
one I have in my book.

-Joe

On Mar 21, 5:30 pm, Franc Zabkar <fzab...@iinternode.on.net> wrote:

On Thu, 20 Mar 2008 21:31:40 -0700 (PDT), joe.hods...@gmail.com put
finger to keyboard and composed:



Hi,

I'm trying to identify a manufacturer and specs for what I believe is
a diode. It's a black cylinder with a silver band surrounding one end,
and its position on the PCB is labeled with a diode symbol and the
identifier CR2 (where 2 is the device manufacturer's arbitrary numeric
id for that component on the PCB). It's about 8.5 mm in diameter and
about 9.5 mm in length.

The component has split in half and I would like to replace it in an
attempt to salvage the device, but the only identifying information on
the component is "LT 9423" on one line, and "22059733" on the next
line. I'm not exactly an electronics hobbyist, so I don't recognize
"LT" as a manufacturer or other sort of designation. Nothing jumped
out at me when I scanned the 100+ pages of diodes in the Digi-Key
catalog.

Can anyone lead me in the right direction? Just FYI, the device is a
windshield wiper control unit for a Chevy pickup truck.

Thanks for your assistance,

Joe

FWIW, plugging the number "22059733" intohttp://www.usbid.com/
suggests that the part is made by LTC which I would normally expect to
be Linear Technology Corp. However, I wouldn't usually associate LTC
with diodes.

The following Estonian (?) discussion talks about an "LT 9636
22059733" diode. This appears to confirm that 9423 is a YYWW date
code:
http://www.elfaelektroonika.ee/foorum/showthread.php?t=30643

Someone mentions a transient voltage suppressor diode (TVS) but I
don't know if that's just a guess or a definite ID. Another person
mentions a 6-10A diode.

FWIW, here is a Chevy wiper/washer wiring diagram:

http://arrc.epnet.com/autoapp/9308VEN/chiltonimages/7000/7921ZGA6L.gif

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

I just noticed that the number on the blue component is very similar
to the one on the broken diode. It's also similar to the PCB part
number, 22122142, and the wiper control assembly part number 22155169.
Just an interesting observation.


On Mar 21, 7:21 pm, joe.hods...@gmail.com wrote:

Thanks for the reply, Eeyore.

Yes, a date code of week 23, 1994 sounds perfectly reasonable for a
1995 Chevy. I've posted some pictures of the diode, the PCB, and the
component that it was connected to. They're available athttp://www.thezac.com/wipers/.

The broken diode was connecting a +12 VDC power source to pin 2 of the
blue component in the last picture. The +12 VDC power source passes
through a 25 amp fuse before coming into the device. The other pins of
the blue component are connected as follows:

Pin 1: One of three terminals on the wiper motor (not the ground
terminal)
Pin 2: The broken diode
Pin 3: Two transistors. I'd have to draw a whole schematic to describe
where these transistors lead.
Pin 4: The cathode terminal of a much smaller (physically) diode that
connects to the same +12 VDC source as the broken diode. This diode
can be seen in the pictures to the right of the label "MIN COATING".
Pin 5: Ground

Don't know if this information provides any insight, but I thought it
couldn't hurt.

Thanks,
Joe

 

[Franc Zabkar]

On Fri, 21 Mar 2008 16:21:23 -0700 (PDT), joe.hodsdon@gmail.com put
finger to keyboard and composed:

Thanks for the reply, Eeyore.

Yes, a date code of week 23, 1994 sounds perfectly reasonable for a
1995 Chevy. I've posted some pictures of the diode, the PCB, and the
component that it was connected to. They're available at
http://www.thezac.com/wipers/ .

The broken diode was connecting a +12 VDC power source to pin 2 of the
blue component in the last picture. The +12 VDC power source passes
through a 25 amp fuse before coming into the device. The other pins of
the blue component are connected as follows:

Pin 1: One of three terminals on the wiper motor (not the ground
terminal)
Pin 2: The broken diode
Pin 3: Two transistors. I'd have to draw a whole schematic to describe
where these transistors lead.
Pin 4: The cathode terminal of a much smaller (physically) diode that
connects to the same +12 VDC source as the broken diode. This diode
can be seen in the pictures to the right of the label "MIN COATING".
Pin 5: Ground

Don't know if this information provides any insight, but I thought it
couldn't hurt.

Thanks,
Joe

The blue part is a 12V relay. Pins 3&4 are the coil, and pins 1, 2,
and 5 are the contacts. The relay switches the positive terminal (1)
of the wiper motor between +12V (2/on) and ground (5/off). The two
transistors control the relay, probably in a wired-OR fashion.

Diode CR6 (?) needs to be rated for the full motor current. It is
probably just a high current rectifier. The diode attached to the
relay coil is there to protect the transistors from back EMF. A 1A
rectifier, eg 1N4007, is normally sufficient for this purpose.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

[Franc Zabkar]

On Fri, 21 Mar 2008 17:18:33 -0700 (PDT), joe.hodsdon@gmail.com put
finger to keyboard and composed:

I just noticed that the number on the blue component is very similar
to the one on the broken diode. It's also similar to the PCB part
number, 22122142, and the wiper control assembly part number 22155169.
Just an interesting observation.

They are probably house numbers belonging to General Motors, or maybe
ITT Automotive.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

On 3ÔÂ21ČŐ, ĎÂÎç12Ęą31ˇÖ, joe.hods...@gmail.com wrote:

Hi,

I'm trying to identify a manufacturer and specs for what I believe is
a diode. It's a black cylinder with a silver band surrounding one end,
and its position on the PCB is labeled with a diode symbol and the
identifier CR2 (where 2 is the device manufacturer's arbitrary numeric
id for that component on the PCB). It's about 8.5 mm in diameter and
about 9.5 mm in length.

The component has split in half and I would like to replace it in an
attempt to salvage the device, but the only identifying information on
the component is "LT 9423" on one line, and "22059733" on the next
line. I'm not exactly an electronics hobbyist, so I don't recognize
"LT" as a manufacturer or other sort of designation. Nothing jumped
out at me when I scanned the 100+ pages of diodes in the Digi-Key
catalog.

Can anyone lead me in the right direction? Just FYI, the device is a
windshield wiper control unit for a Chevy pickup truck.

Thanks for your assistance,

Joe

Do you want access to China's massive pool of electronic
manufacturers... but lack the time to contact suppliers, negotiate
contracts, arrange shipping or monitor product quality? Don't worry -
Let seriouswholesale deal with all that for you.

*Check out the huge range of Gadgets, MP3 / MP4 Players, Car DVD /
Audio, and Computer Accessories now by visiting the online wholesale
catalog at seriouswholesale. com You'll have peace of mind thanks to
the seriouswholesale Quality Control, 12-month Warranty on all
products, and easy secure payment by credit card through Paypal.

Selling on eBay or your own online store? Send products direct from
our warehouse to your customers using our unique drop-shipping
service. You can profit by selling hundreds of different products,
without holding any of your own inventory! Any questions you have will
be answered by the seriouswholesale English-speaking customer support
team... Their aim is to make your China electronics importing business
easier to run than ever before.

Welcome to http://www.seriouswholesale.com.

seriouswholesale - Buy from the source, profit without the hassle.

- 12 Months Warranty - No minimum order restrictions - Drop-shipping
with no additional fee - Pay by safely by PayPal seriouswholesale
Wholesale Co., Ltd.: Chinas original and best online electronics
wholesaler & drop-shipper: seriouswholesale. com

 

On Mar 21, 11:46 pm, Franc Zabkar <fzab...@iinternode.on.net> wrote:

The blue part is a 12V relay. Pins 3&4 are the coil, and pins 1, 2,
and 5 are the contacts. The relay switches the positive terminal (1)
of the wiper motor between +12V (2/on) and ground (5/off). The two
transistors control the relay, probably in a wired-OR fashion.

Diode CR6 (?) needs to be rated for the full motor current. It is
probably just a high current rectifier. The diode attached to the
relay coil is there to protect the transistors from back EMF. A 1A
rectifier, eg 1N4007, is normally sufficient for this purpose.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

Thank you for the explanation Franc. You say that diode CR6 needs to
be rated for the full motor current; does it need to match the motor
current exactly, or is the motor current the minimum rating I can use
(i.e. if the motor uses 2A, can I use a diode rated at 2A or higher)?
There's a 25A fuse behind the +12V attached to this diode, so should I
assume that it could potentially see up to 25A ?

Thanks again,
Joe

 

On 3ÔÂ21ČŐ, ĎÂÎç12Ęą31ˇÖ, joe.hods...@gmail.com wrote:

Hi,

I'm trying to identify a manufacturer and specs for what I believe is
a diode. It's a black cylinder with a silver band surrounding one end,
and its position on the PCB is labeled with a diode symbol and the
identifier CR2 (where 2 is the device manufacturer's arbitrary numeric
id for that component on the PCB). It's about 8.5 mm in diameter and
about 9.5 mm in length.

The component has split in half and I would like to replace it in an
attempt to salvage the device, but the only identifying information on
the component is "LT 9423" on one line, and "22059733" on the next
line. I'm not exactly an electronics hobbyist, so I don't recognize
"LT" as a manufacturer or other sort of designation. Nothing jumped
out at me when I scanned the 100+ pages of diodes in the Digi-Key
catalog.

Can anyone lead me in the right direction? Just FYI, the device is a
windshield wiper control unit for a Chevy pickup truck.

Thanks for your assistance,

Joe

Do you want access to China's massive pool of electronic
manufacturers... but lack the time to contact suppliers, negotiate
contracts, arrange shipping or monitor product quality? Don't worry -
Let seriouswholesale deal with all that for you.

*Check out the huge range of Gadgets, MP3 / MP4 Players, Car DVD /
Audio, and Computer Accessories now by visiting the online wholesale
catalog at seriouswholesale. com You'll have peace of mind thanks to
the seriouswholesale Quality Control, 12-month Warranty on all
products, and easy secure payment by credit card through Paypal.

Selling on eBay or your own online store? Send products direct from
our warehouse to your customers using our unique drop-shipping
service. You can profit by selling hundreds of different products,
without holding any of your own inventory! Any questions you have will
be answered by the seriouswholesale English-speaking customer support
team... Their aim is to make your China electronics importing business
easier to run than ever before.

Welcome to http://www.seriouswholesale.com.

seriouswholesale - Buy from the source, profit without the hassle.

- 12 Months Warranty - No minimum order restrictions - Drop-shipping
with no additional fee - Pay by safely by PayPal seriouswholesale
Wholesale Co., Ltd.: Chinas original and best online electronics
wholesaler & drop-shipper: seriouswholesale. com

 

[Franc Zabkar]

On Sat, 22 Mar 2008 09:37:12 -0700 (PDT), joe.hodsdon@gmail.com put
finger to keyboard and composed:

On Mar 21, 11:46 pm, Franc Zabkar <fzab...@iinternode.on.net> wrote:

The blue part is a 12V relay. Pins 3&4 are the coil, and pins 1, 2,
and 5 are the contacts. The relay switches the positive terminal (1)
of the wiper motor between +12V (2/on) and ground (5/off). The two
transistors control the relay, probably in a wired-OR fashion.

Diode CR6 (?) needs to be rated for the full motor current. It is
probably just a high current rectifier. The diode attached to the
relay coil is there to protect the transistors from back EMF. A 1A
rectifier, eg 1N4007, is normally sufficient for this purpose.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

Thank you for the explanation Franc. You say that diode CR6 needs to
be rated for the full motor current; does it need to match the motor
current exactly, or is the motor current the minimum rating I can use
(i.e. if the motor uses 2A, can I use a diode rated at 2A or higher)?
There's a 25A fuse behind the +12V attached to this diode, so should I
assume that it could potentially see up to 25A ?

Thanks again,
Joe

If the diode is connected between the +12V supply and the motor (via
the relay), then it must be able to carry the full motor current under
all possible conditions, including startup on a dry windscreen. A 25A
diode would be a very safe choice, although I suspect that it would be
gross overkill. You will probably find that rectifiers with the
dimensions that you have provided are typically rated at less than
10A, probably only 6A. A Motorola MR751 or MR752 are two likely
suspects (9mm x 9mm). These have a 400A surge rating, and 6A average
forward current. Semikron P1000 series diodes may be a better choice,
eg the P1000D is rated for 10A and 200PIV.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

On Mar 22, 4:20 pm, Franc Zabkar <fzab...@iinternode.on.net> wrote:

Thank you for the explanation Franc. You say that diode CR6 needs to
be rated for the full motor current; does it need to match the motor
current exactly, or is the motor current the minimum rating I can use
(i.e. if the motor uses 2A, can I use a diode rated at 2A or higher)?
There's a 25A fuse behind the +12V attached to this diode, so should I
assume that it could potentially see up to 25A ?

Thanks again,
Joe

If the diode is connected between the +12V supply and the motor (via
the relay), then it must be able to carry the full motor current under
all possible conditions, including startup on a dry windscreen. A 25A
diode would be a very safe choice, although I suspect that it would be
gross overkill. You will probably find that rectifiers with the
dimensions that you have provided are typically rated at less than
10A, probably only 6A. A Motorola MR751 or MR752 are two likely
suspects (9mm x 9mm). These have a 400A surge rating, and 6A average
forward current. Semikron P1000 series diodes may be a better choice,
eg the P1000D is rated for 10A and 200PIV.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

Thanks again, I appreciate the advice.

-Joe

 

On 3ÔÂ21ČŐ, ĎÂÎç12Ęą31ˇÖ, joe.hods...@gmail.com wrote:

Hi,

I'm trying to identify a manufacturer and specs for what I believe is
a diode. It's a black cylinder with a silver band surrounding one end,
and its position on the PCB is labeled with a diode symbol and the
identifier CR2 (where 2 is the device manufacturer's arbitrary numeric
id for that component on the PCB). It's about 8.5 mm in diameter and
about 9.5 mm in length.

The component has split in half and I would like to replace it in an
attempt to salvage the device, but the only identifying information on
the component is "LT 9423" on one line, and "22059733" on the next
line. I'm not exactly an electronics hobbyist, so I don't recognize
"LT" as a manufacturer or other sort of designation. Nothing jumped
out at me when I scanned the 100+ pages of diodes in the Digi-Key
catalog.

Can anyone lead me in the right direction? Just FYI, the device is a
windshield wiper control unit for a Chevy pickup truck.

Thanks for your assistance,

Joe

Do you want access to China's massive pool of electronic
manufacturers... but lack the time to contact suppliers, negotiate
contracts, arrange shipping or monitor product quality? Don't worry -
Let seriouswholesale deal with all that for you.

*Check out the huge range of Gadgets, MP3 / MP4 Players, Car DVD /
Audio, and Computer Accessories now by visiting the online wholesale
catalog at seriouswholesale. com You'll have peace of mind thanks to
the seriouswholesale Quality Control, 12-month Warranty on all
products, and easy secure payment by credit card through Paypal.

Selling on eBay or your own online store? Send products direct from
our warehouse to your customers using our unique drop-shipping
service. You can profit by selling hundreds of different products,
without holding any of your own inventory! Any questions you have will
be answered by the seriouswholesale English-speaking customer support
team... Their aim is to make your China electronics importing business
easier to run than ever before.

Welcome to http://www.seriouswholesale.com.

seriouswholesale - Buy from the source, profit without the hassle.

- 12 Months Warranty - No minimum order restrictions - Drop-shipping
with no additional fee - Pay by safely by PayPal seriouswholesale
Wholesale Co., Ltd.: Chinas original and best online electronics
wholesaler & drop-shipper: seriouswholesale. com

 

[Pieter]

On Thu, 20 Mar 2008 21:31:40 -0700 (PDT), joe.hodsdon@gmail.com wrote:

Hi,

I'm trying to identify a manufacturer and specs for what I believe is
a diode. It's a black cylinder with a silver band surrounding one end,
and its position on the PCB is labeled with a diode symbol and the
identifier CR2 (where 2 is the device manufacturer's arbitrary numeric
id for that component on the PCB). It's about 8.5 mm in diameter and
about 9.5 mm in length.

The component has split in half and I would like to replace it in an
attempt to salvage the device, but the only identifying information on
the component is "LT 9423" on one line, and "22059733" on the next
line. I'm not exactly an electronics hobbyist, so I don't recognize
"LT" as a manufacturer or other sort of designation. Nothing jumped
out at me when I scanned the 100+ pages of diodes in the Digi-Key
catalog.

Can anyone lead me in the right direction? Just FYI, the device is a
windshield wiper control unit for a Chevy pickup truck.

Thanks for your assistance,

Joe

Hi,

I tool a look at your foto. It is a diode. Which exactly is not so
important. Use any diode that can handle currents above 6 ampere.
Preferrably over 10A. Voltage that of your car (12 or 24) or higher.

I do not have the circuit diagram, but made electronics for
wind-shield wipers myself, very long ago. I remember that there are
two ways to let the wipers return to the down-position after you turn
them off. You can either use a relay with multiple contacts, or you
can use a higher-current diode to let the motors run to the
down-position. I think that it is this diode.

If the wipers were blocked, the wiper nmotor will draw a strong
currents up to 3 to 6 times the normal current, and that may have
destoyed your circuit. I saw in your foto that your relay burnt out
too. It can also have been a short-circuit. So replace the diode and
relay but do not install/use/test them before you tested the wiring
for short-circuits!

Regards,
Pieter