wiring harness replacement on Farmall 576

wmmcclure7

New User
I'm redoing the wiring harness on a Farmall 756. Some of the old wires are broken and I can not be sure where they go. Any suggestions on where a diagram or pictures would be showing where they might go? I am working on the dash where the lights, starter switch etc. are located.
 
Don't have a diagram or pictures, but considering the age of the tractor, the wiring will be basic and straight forward, no mystery electronics!

If you will do some investigation, chances are you can identify what the wire does and where it came from. Don't look at the entire harness, it may be overwhelming. Instead look at each circuit. Make a list of what works, and a list of what doesn't. The stuff that works, look it over for needed attention.

What doesn't work, look for clues. Look at the color of the wire, look at where it would logically lay when connected, where it will reach to, etc. Say you have a headlight that doesn't work. Out at the base of the light is a yellow wire. Looking under the dash, there is a yellow wire hanging near the light switch. Good chance it came from the light switch. Start with the easy and obvious, by process of elimination it will all eventually come together.

A test light is a very handy tool to have. Takes a lot of guess work out of it, will diagnose 90% of what you will need for that tractor!

Don't be afraid to try, but do be careful. Be sure to keep the transmission in neutral while working on the wiring, keep clear of moving parts, just in case. Use your computer! Google images and Youtube have a wealth of information. It doesn't have to be specific to your tractor, the early circuits are widely generic to many models.

Hope this helps, let us know how it goes!
 

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