Well, if you're rewiring OE components, it's typically best to do it as the OEM did it. If you're adding aftermarket accessories, you'll want to ensure you have the appropriate gauge of wire for what you're wiring up, and figure out whether you'll run it from the existing power distribution module or add an additional one.
This is a really vague question which really begs for more detail... as is, we don't know if you're trying to repair/replace OE wiring harnesses, add aftermarket accessories on, rebuild the complete wiring system, etc.
It is a '77 or '78 International Scout
No. The wiring connectors are different. Latest is 77
where would you get a wiring diagram for a 1987 dodge ram 350 truck
The truck manufacturer will have a record of the wiring in each truck.
77
The 1999 monster truck stereo wiring diagram can be obtained from most Mazda dealerships. The stereo has a wiring harness consisting of five wires.
I need a wiring diagram for the battery, starter, and solenoid of a 1971 Chevy truck, 350.
Ignition wiring diagram
The starter solenoid wiring diagram can be obtained from most International truck dealerships. The wiring diagram can also be found at most auto-parts stores.
www.LMC.com
You can get the wiring diagrams for the 1999 Chevy C1500 truck online at places like AutoZone and Modified Life. You can also find the wiring diagram at Auto Parts Warehouse.
Get a chiltons repair manual from the library for your car.