When utilizing a Painless wiring harness, the alternator excitor wire needs to be wired into the regulator's white w/red stripe wire. I then spliced a wire directly into the hazard switch for power per the original wiring diagram for my 73. If you do not plug the excitor wire in here, the battery will not charge...I learned the hard way, luckily I wasn't far from home!
FYI-Painless Alternator Wiring Tip
- Thread starter MuskieFJ
- Start date
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cruiserbrett
GOLD Star
isnt the hazard switch always hot? I would think you would want it switched 12v instead?
Gave up
I gave up with the "Painless" harness and decided to take my rig to a professional once the body work is complete. There just was not a source I could find to cross reference the old Toyota wires to the Painless system.
I mean the Painless system will tell you that the wires go to a certain place, but then you have a plug that several wires feed into. I'm not an electrician so I gave it up.
I gave up with the "Painless" harness and decided to take my rig to a professional once the body work is complete. There just was not a source I could find to cross reference the old Toyota wires to the Painless system.
I mean the Painless system will tell you that the wires go to a certain place, but then you have a plug that several wires feed into. I'm not an electrician so I gave it up.
Downey
SILVER Star
My guess is this thread deals with Painless harness to stock Toyota alternator, and I surely don't know much about that!! The wiring from Painless or any other harness to a GM alternater is a simple matter, BUT GM has three different generations of alternators, and each one has a specific wiring requirement (per our engine conversion manual wiring instructions). Wiring one of these the wrong way could instantly burn up the alternator. If using a higher amp hour GM alternator, by-crackie get a copy of these instructions!!!!!
I gave up with the "Painless" harness and decided to take my rig to a professional once the body work is complete. There just was not a source I could find to cross reference the old Toyota wires to the Painless system.
I mean the Painless system will tell you that the wires go to a certain place, but then you have a plug that several wires feed into. I'm not an electrician so I gave it up.
if you could figure out what each of the wires to the plug does, you can cut the plug off and connect the correct wires - that's what I did on my 40
[need to keep the OEM hazard, blinker, brake switches and recreate the wiring between them in OEM fashion, though; those switches work by interrupting a hot circuit, not by activation of a circuit as in GM philosophy
]it can be done, but it's not Painless
