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: toyota wiring to a high output gm altenator flatyota 02-12-2005, 05:27 PM i just searched and couldn't exactly what im looking im for. my buddy has a fj40 with 350 in it. just put a new GM alternater on it, question is what is needed to go from original style 3 prong plug to the gm 2 prong plug. any pics would be great i know many guys have done this, just cant find the info i need thanks in advance. cruiserbrett 02-12-2005, 06:10 PM There are about 5 different commonly swapped GM alternators, so more info would be helpful. If youre looking at a 12si, its easy. buy a new plug from kragen and red wire goes to the + terminal on the alternator(where the stock ~10ga blue and white wire attaches) and the white will need switched 12v with a diode in line to prevent back feed. IDave 02-12-2005, 07:21 PM buy a new plug from kragen and red wire goes to the + terminal on the alternator(where the stock ~10ga blue and white wire attaches) Ummm, WL wire go to (-) post on ammeter. :D :D cruiserbrett 02-13-2005, 01:41 AM Ummm, WL wire go to (-) post on ammeter. :D :D ? yeah, but the other end attaches to the + terminal of the ALTERNATOR. IDave 02-13-2005, 04:31 AM ? yeah, but the other end attaches to the + terminal of the ALTERNATOR. On my toyota alternators, it is marked "B". :D Sorry, not trying to be smart. cruiserbrett 02-13-2005, 11:09 AM Here is what came out of my FJ45 when I went back to a 6 cylinder. It worked great. You'll notice the red with white stripe wire has taken the place of the white/blue wire in the factory harness. Also there is a diode just visible on the white wire, going to teh fuse block for switched 12V with ignition on. Red wire loops back to + terminal on alt. Or "batt" terminal, whatever you want to call it. flatyota 02-13-2005, 11:31 AM thanks for help guys ill try it a see what we can figure out | |