Fried wires to alternator

[gudtimer41]

Duh, when reinstalling the battery in my '82, I put it in backwards. As a result, I fried several wires (red, blue and black) to the alternator. I have the red one replaced and it goes to the starter, but I'm not at all certain where the blue and black ones need to go. The car starts fine and runs ok, but my tester shows the alternator is bad and I wouldn't be surprised if the regulator is cooked in it but....... where do those other wires go to? Any help, etc. Ed

[aj81spider]

Here's a link to the wiring diagram. Anything I could tell you I would only get from that.

Hopefully it is of some help. I think page 6 is the relevant page.

http://www.artigue.com/fiatcontent/Wiring_1980_1982.pdf

[spider2081]

I think the blue wire might be something a previous owner added. Do you have a headlight relay modification or alarm installed??

[gudtimer41]

I think the blue wire might be something a previous owner added. Do you have a headlight relay modification or alarm installed??

Nothing of that nature that I can see. The strange thing is that these three wires were all fused together and the insulation melted, but they all led to the same source to be connected. What the heck?? I fashioned one heavy 10 guage wire to connectors and attached them to where the original was hooked up. My tester said that the alternator was no good, so I'll take the car to a shop to check it out. I'd replace the alternator as a matter of course, but the parts place said that the '82 had two different ones fitted. I would guess that the more heavy duty one was supplied with the power window version, which I don't have, but I guess that the only way to find out is to actually pull it and take it in, don't you think?

[gudtimer41]

Here's a link to the wiring diagram. Anything I could tell you I would only get from that.

Hopefully it is of some help. I think page 6 is the relevant page.

http://www.artigue.com/fiatcontent/Wiring_1980_1982.pdf

Thanks very much. Now I have to find someone who can make heads or tails out of it.

[spider2081]

My diagram shows only 2 wires on the alternator output terminal. Both are black. The one that goes to the battery cable on the starter solenoid should be a #8 wire. The one that goes to the fuse panel should be a # 10 wire. The one to the fuse panel feeds fuses 9 and 10 the hot all the time fuses in the panel. I looked at Brad's diagram which is a different source than mine and it too shows only 2 wires on the alternator output terminal. Neither shows a blue wire that I can see.

I believe that you car would have had a 65 amp Bosh alternator as original equipment. It should have a black wire with violet trace connected to the D+ terminal with a push on terminal. This terminal excites the alternator and puts the batter warning light in the tachometer out when the alternator is working.