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Author
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Topic: Alternator question. (need answer quick)
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iamblackjack
Gearhead Posts: 190
From: A small town in South East Texas.............Houston.
Registered: Jan 2002
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posted 08-09-2002 07:49 PM
   
This isn't on a Mustang, but the sooner I get it fixed, the sooner I can get back to working on my Mustang.
It's on an '82 CJ7. I've never seen something with so much duct tape and scabbed on wires.
It's internally regulated. There's a #10 wire that goes from the alt. to the battery and then to the fuse block. There are two spade plugs on the side of the alternator. One loops right back to the #10 wire. The other is the one in question.
I've traced it out and it goes through numerous "connections" (the after market kind). None of which are on the schematics (Haynes manual).
Haynes lists it as "brown 18 (resistance 15)". I assume that is 18 gage and 15 ohms of resistance. It reads 266 ohms to ground. It will not charge with this wire plugged in, but if I jumper it straight to a 12 volt sorce, it will. I'm sure that the 12 volt sorce is supposed to be "on" when the ignition is on, based on the fact that it slightly arcs when the engine is off and I remove the wire. I don't want to burn up the alt. or the Jeep.Does anyone have any input on this? PS. Another good reason to get it fixed is because I've loaned him my truck until I get it fixed. D*** I'm a nice guy.  Thanks, Kirk
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SteveLaRiviere
Administrator Posts: 33988
From: Saco, Maine
Registered: May 99
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posted 08-09-2002 08:43 PM
Where does it lead to?I bet SteveW can help you, he's a jeepster. ------------------
All Fords since 1977!
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steve'66
Gearhead Posts: 6602
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 08-09-2002 08:48 PM
I'll go look on my '79Be right back.... SteveW
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SteveLaRiviere
Administrator Posts: 33988
From: Saco, Maine
Registered: May 99
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posted 08-09-2002 08:53 PM
That SteveW is a good dude!  ------------------
All Fords since 1977!
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steve'66
Gearhead Posts: 6602
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 08-09-2002 09:08 PM
OK,It is a blue wire w/black trace. It goes to the bottom left position of the two junction blocks on the firewall to the driver's side of the master cylinder. I didn't trace it under the dash. Does this help? SteveW
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iamblackjack
Gearhead Posts: 190
From: A small town in South East Texas.............Houston.
Registered: Jan 2002
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posted 08-09-2002 09:53 PM
I'm pretty sure that it's hot when the ignition is on. I'm just concerned about the book saying "(resistance 15)". Is this a current limiting resister, I wonder? I hate to just hook it to a switched hot and burn it up. But at the same time, it IS internally regulated. So it should take care of it's self....right?  I'm probably over thinking all of this though. I work on stuff that is ten times as complex as this Jeep. BTW...They also used Motorcraft alt.s on the jeeps identical to the one on my Mustang. And I happen to have a brand new one. I just couldn't find my voltage regulator. I think that I threw it away. I plan to put a one wire alt. on my car when I put it back together. Kirk.
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