You can get guide from many sites.. i know few
error codes/ fault codes, wiring diagrams, schematic diagrams, torque specs, engine info, switches functioning, assemble, disassembly, complete refurbish, repair, installation every single thing is
within seconds u can get the access and it's totally illustrative complete
SOURCE: 1997 gmc truck no backup light
Check if there is no power at the bulb socket or check all the fuses, if they are good you have a bad backup light switch, are a broke wire.
SOURCE: fuse box wiring is different
I suggest you go to Autozone.com, and Become a Member. (Top right corner of home page)
[After you have joined, and signed in, go to the top left, and click on Manage My Vehicles.
On the next page go to the middle right, and click on Add a Vehicle, in the orange button.
Now click on the Year, Make, Model, and Engine.
On the next page that comes up, click on Vehicle Repair Guides, in the left hand column.
In the middle column click on Chassis Electrical, then on this page go to the bottom, and click on Wiring Diagrams]
I have seen all three years you listed, and the wiring diagrams for them. I refer people to this site only for free wiring diagrams, usually.
[Besides my experience, I also use my Mitchells shop manuals for solutions]
Problems are answered here on FixYa in a solution, and we have some excellent experts, in case you have questions about that wiring.
-Looks like couple answer to your problem already. But anyway
let's try this:
-Take a close look in the electrical schematic in its repair manual. How many components does that fuse supply power to it.?
-Now you know . Let's test one at a time. follow it's specification on the repair manual. You should be able to identify which one use too much power that not suppose to and replace it.
Good luck
Mai
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