Electrical Modified schematics

[Rude Dude]

I was looking at the general schematics section of this forum and saw the colored drawings for the 67-72, I saw that I could use the drawings so I down loaded them and deleted a lot of uneeded stuff. I am using this as a quick reference just wanting to share with ever one maybe you can use or maybe not. The ignition portion will be different on your vehicle because I will be using petronics and one wire alternator. Have fun!

[NEWFISHER]

Thanks for the modification and the post!
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[mr48chev]

On thing, stay with the GM Factory color coding for the whole wiring system no matter how simple yours ends up being. That will save untold headaches for you and anyone after you who works on the wiring.

I have done trouble shooting on the side of the road on my frend's old 29 Model A roadster that was wired with all red wire. It had the correct gage wire for different things but the guy who built the car for him used red wire for everything because he had got a great deal on several large rolls of red wire. It turned what should have been a five minute job into an hour long job of first figuring out what wire did what and then finding and fixing the problem.

Using that as a template I'd draw out my own wiring diagram with just the wires I needed. Then you can scan it and print out one to have in the shop and one to have in the truck.

[1project2many]

I have done trouble shooting on the side of the road on my frend's old 29 Model A roadster that was wired with all red wire. It had the correct gage wire for different things but the guy who built the car for him used red wire for everything because he had got a great deal on several large rolls of red wire. It turned what should have been a five minute job into an hour long job of first figuring out what wire did what and then finding and fixing the problem.

Boy don't I know that pain. I had a mid 80s Toronado in the shop once with all white dash wires. Harness as big as my wrist and a million electrical boxes, relays, etc. Had numbers on the wires but faded, small, etc so hard to trace. No fun, lotsa extra time and work.

International truck came in burned one day. Service manager said "Fix!" I put my foot down when it came to wiring. "Get a replacement harness because I'm not going to fart around with wrong colors, wrong gauge, etc." Waited several weeks for OE replacement harness. All wires were white, same gauge and had no connectors on engine side.

These days I work on school buses. Many times all wires are same color, or maybe only two or three different colors. If you think reading numbers off white wires was hard, try it when the wires are black and all tucked into a corner where you can't go.

[_Ogre]

thanks for the pics rude dude
the best instructions for wiring can be downloaded free from the painless site.
the extent that we modify our trucks every truck is different but basically the same.
everyone has headlights, blinkers and a stop light switch and everything gets wire pretty much the same

though i don't see provisions for 2 amps, power windows, cruise, ac and my remote start


1project2many: i got my start in school buses my freshman yr of high school. started out sweeping the puke out of the isles and progressed to an all around tech. it taught me many things, one thing i learned... that i never wanted to be a mechanic

[AZbent]

Sorry to the orig poster, but I had to say this about wires. Do stick with the factory color code as close as possible. As an aircraft mechanic, specializing in the electrical systems all one wire color does suck. Todays modern commercial aircraft have almost exclusively white wires with the numbers stamped on the wire. When you are working around dozens or even hundreds of wires at times, trying to read the wire numbers is a real PITA as we all get older.
Mark

[Rude Dude]

Dude, I feel your pain I am an avionics specialist, been working aircraft for 34 years, currently working F-22 at Edwards AFB. I used the the schematic's for reference only because the coulmn are the same color code as tilt's used by Ididit, Flaming River and so on. The color codes are all basicly the same on 55 thru 72 for lighting on these trucks. I posted it for use as a quick reference only if you go to the original drawing and compare it gets confusing with all the other stuff on added on.

Originally Posted by AZbent

Sorry to the orig poster, but I had to say this about wires. Do stick with the factory color code as close as possible. As an aircraft mechanic, specializing in the electrical systems all one wire color does suck. Todays modern commercial aircraft have almost exclusively white wires with the numbers stamped on the wire. When you are working around dozens or even hundreds of wires at times, trying to read the wire numbers is a real PITA as we all get older.
Mark

[GBM]

I worked on the AV8B Harriers in the USMC, talk about all the same color wiring......wheeeeeewwww I hated that. Wire tags that melt off or fall off; having to read the numbers to decifer what they are especially in a grouping of 100 wires in a bundle. Then they run 30 ft from the front of the jet to the rear and weasel in and out of panels and ribs.

I love a nice simple color coded wiring diagram and wiring harness. Definately stick with stock colors if possible for ease and fewer headaches! I need to create a newwiring harness for the mudrace truck. lots of soldering and heat shrink and dielectric grease