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Engine bay wiring diagrams needed?

Tiny
JAIR
  • MEMBER
  • 1990 DODGE TRUCK
  • 5.9L
  • 6 CYL
  • TURBO
  • 4WD
  • AUTOMATIC
  • 219 MILES
Hello, I am restoring the truck listed above W250 and I am looking for engine bay wiring diagrams and specific wire colors diagrams because I need to repair the wiring harness in multiple locations. Any pictures and PDF downloads would be very helpful.
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Monday, October 16th, 2023 AT 11:29 AM

9 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,940 POSTS
Yep, here are the engine wiring diagrams that include the engine control module and I have included a guide to help you test the wiring connections as well.

https://www.2carpros.com/articles/how-to-check-wiring

Check out the images (below). Please let us know what happens.
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Monday, October 16th, 2023 AT 12:09 PM
Tiny
JAIR
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  • 8 POSTS
This is helpful, but are these diagrams for a diesel truck? My truck is diesel and I noticed that these diagrams might be for a gas truck. Thanks for the help in advance.
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Tuesday, October 17th, 2023 AT 5:16 AM
Tiny
KEN L
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Sorry, they don't show a diesel engine in this truck? Did someone install a different engine?
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Tuesday, October 17th, 2023 AT 9:43 AM
Tiny
JAIR
  • MEMBER
  • 8 POSTS
Uh not that I know of it is a 1990 Dodge W250 with a 5.9L turbo diesel.
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Tuesday, October 17th, 2023 AT 9:48 AM
Tiny
KEN L
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  • 42,940 POSTS
Gotcha, here are the engine wiring diagrams needed. Check out the images (below).
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Tuesday, October 17th, 2023 AT 9:53 AM
Tiny
JAIR
  • MEMBER
  • 8 POSTS
Okay, thanks this is helpful. Also, if you have one for the main wiring harness that is in the engine bay (which plugs into the cab) that would be awesome.
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Tuesday, October 17th, 2023 AT 9:58 AM
Tiny
JAIR
  • MEMBER
  • 8 POSTS
I also need one that has the light circuit in it because my headlights and blinkers are not working properly.
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Wednesday, October 18th, 2023 AT 8:59 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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Sorry, we only handle one problem per thread, please post your new question here, you must be logged in.

https://www.2carpros.com/questions/new

Cheers, Ken
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Thursday, October 19th, 2023 AT 10:48 AM
Tiny
JAIR
  • MEMBER
  • 8 POSTS
Okay, I posted a new question and it is called 1990 Dodge w250 Turbo Diesel.
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Thursday, October 19th, 2023 AT 11:08 AM

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