Thanks Seajay2! The wires are black, green with a black tracer, and red. The wiring harness is only a few years old, I installed it new. The wagon is a 51- it had a Studebaker 259 in it, but it threw a bearing cap. I installed a 6-226 in it (required minor modifications) and am finalizing everything before I fire it off, the battery isn't installed yet.What three colors do you have?
1. First: Don't attach any wire. Whichever has voltage when key is on, is for the coil.
2. Next two, hook one up to oil pressure sender. If gauge registers when motor starts and climbs as revs go up, it's oil.
3. If not, try the other on the oil sender. Oil gauge should climb right away but temp takes more time to come off peg.
Testing voltage for no. 1: Do you know how? What meter or test light do you have? Advise before testing if you don't know how.
Not always good to go by colors. The manual I have, has no colors. They could have been changed by numerous previous owners. Either on your vehicle or on the person advising vehicle's wiring. Go by hand tracing/continuity/tests or by function.
Thanks it was built for a Willys wagon with a 226Options:
1. If you don't have the harness instructions, contact the harness maker.
2. Wait till you get the battery in.
3. Advise what harness part number, and vendor, and someone can give color advice.
4. There is no stress on this. So keep going forward.
5. It's just a little hard to get the colors. We don't know if harness was built to a 51 Willys, a Studebaker or a 226 motor.