New harness installation, can I get a complete detailed map of cabin and under hood diagram?

1986 OLDSMOBILE CUTLASS

75,000 MILES • 5.3L • V8 • 2WD • AUTOMATIC

BOSSBOSS

MEMBER
2 POSTS

I'm installing a 21-circuit harness into the car listed above. I have everything out and ready for the new harness. But I for the life of me cannot find a complete detailed map of cabin and under hood diagram that's complete with color code. I'm using a lm7 5.3 with a holly Terminator xmaxx stand alone, 4l80e trans. Under the hood will be okay. But I need to rewire the complete inside of the car. I don't mind paying you guys for this info if you can provide me with a detailed map of the inside diagram for wiring. Please help, I'm in dire need of y'all expertise. I've spoken with you once before on YouTube about wiring in cab for a 1986 cutlas, please get back to me.

Mar 6, 2024 at 8:49 AM

STRAILER

✓ASE Certified Mechanic
54,832 POSTS

So, which wiring diagrams do you need? HVAC? engine? Sounds like it is going to be a fun car :) Here is the engine wiring harness please let me know what else you need. Check out the images (below). Let us know how it goes.

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
Click here to log in and view diagram.

Mar 6, 2024 at 11:40 AM

BOSSBOSS

MEMBER
2 POSTS

I need the diagram for a 1986 cutlass supreme in cab. So, I'm rewiring the car's harness itself. So, if possible I need a color coded diagram of all rear brake lights dome lights dash, A/C, doors, front and rear blinkers/hazards, wiper/fluid spray, windows, door locks, headlights, etc. I think I can handle my 5.3l ls lm7 swap, especially with the holly Terminator xmax stand alone. I just need the car harness diagram, and whatever needs to connect to the standalone harness.

Mar 6, 2024 at 12:12 PM

STRAILER

✓ASE Certified Mechanic
54,832 POSTS

Sure, here are all of the wiring diagrams you have requested. Check out the images (below). Let us know if you need anything else.

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
Click here to log in and view diagram.

Mar 6, 2024 at 1:34 PM

STRAILER

✓ASE Certified Mechanic
54,832 POSTS

anything?

May 11, 2024 at 12:05 PM

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