Wire harness for pin out procedure needed?

DASTIGHT

MEMBER
1990 CHEVROLET 1500
5.7L
V8
2WD
AUTOMATIC
345,098 MILES

Wire harnesses were butchered and I’m trying to get back to factory specifications. I need engine harness/and sensor location for everything under hood, also the wire harness diagram for in cab harness including specs. Please help.

Sunday, March 23rd, 2025 AT 2:44 PM

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
50,192 POSTS

We only handle one request at the time, here are the engine wiring diagrams for the 5.7 liter engine, please start new threads for the other issues, this guide can help you with the testing.

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

Check out the images (below). Please let us know what happens.

Images (Click to make bigger)