Under dash wiring diagram needed

Tiny
APRIL PRAYLOR GIST
  • MEMBER
  • 1990 CHEVROLET VAN
  • V8
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
I had a fire in my van and it's basically under the dash I have to replace the dash and everything there I need a wiring diagram for the wires under the dash. I got a harness from junk yard and been piecing it together but have nothing to work from. Colored would be great.
Sunday, July 3rd, 2022 AT 3:39 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,125 POSTS
Hi,

I would be happy to help, but there is one issue. There isn't a specific schematic for under the dash because the wiring there is responsible for multiple circuits. For example, there is wiring for the radio, brake lights, signals, headlamps, ignition, and so on.

Is there a specific circuit or component that you need? I would be happy to help, I just need to narrow things down.

Let me know.

Joe
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Sunday, July 3rd, 2022 AT 10:37 PM
Tiny
APRIL PRAYLOR GIST
  • MEMBER
  • 2 POSTS
Yes of course sorry, as I said all wiring under dash burned, I've managed to do some correctly. 'I think I need the brake light, turn signal, hazard wiring.
Thank you
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Monday, July 4th, 2022 AT 12:12 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,125 POSTS
Hi,

No problem whatsoever. LOL You would have wanted to hurt me if I sent everything. LOL

Regardless, because of the model year, the only thing I have for these circuits are the original schematic from the manufacturer. They are a little more difficult to follow, so let me know if you have questions.

As far as the brake lights, signals, and hazard lights, they are all tied together. See the two pics below and let me know if they help.

Take care,

Joe

See pics below.
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Monday, July 4th, 2022 AT 8:59 PM

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