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Old 07-11-2005, 11:22 AM
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Wiring problem is driving me crazy

87 Jeep YJ, back converted to points (70's Ford style)

We are getting voltage to the coil with the ignition switch off. Initial guess was a problem with the switch, but still have the problem with the switch disconnected. So I started disconnecting fusible links from power distribution, and when I disconnected the link connected to the alternator the problem goes away.

However, the alternator does not appear to be wired incorrectly. This is a 3 wire style, and the little wire is spliced into an ignition circuit that connects to the coil -- consistent with factory diagram.

I just don't see what the problem is -- any clues?

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Old 07-11-2005, 11:40 AM
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I seem to recall reading about a condition that requires a diode in the alternator link to prevent back feed when the ignition is off. Trying to remember what it was

Vince
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Old 07-11-2005, 01:55 PM
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Your comment triggered something, and I went browsing in my Speedway Motors catalog. On p.130, I read "hanging a GM alternator -- wired up with any parts store plug -- your engine won't shut off -- the alternator will feed back juice to the ignition switch... you need this handy little harness...."

For $18 I just ordered it, that must be the problem. Not the first previous owner electrical snafu....
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Old 07-11-2005, 05:50 PM
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Putting a diode on the #1 wire does the trick:



You can buy these puppies from Radio Shack ... a pack of 4 for like $3 -- Part #1N4001

Alan
54 Chevy Pickup
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Old 07-11-2005, 08:03 PM
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[QUOTE=horvath]

You can buy these puppies[QUOTE]

Geeeze your way too old to be using that term .

Vince
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Old 07-11-2005, 08:30 PM
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LOL! Not inside my head I ain't!


Alan
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Old 07-12-2005, 07:29 PM
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Thanks Alan!

59 cents for 2 -- it worked like magic -- my kids think I am a genius -- or that my friends are geniuses (genii?)
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Old 07-12-2005, 07:45 PM
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Quote:
Originally Posted by pmeisel
59 cents for 2 -- it worked like magic -- my kids think I am a genius -- or that my friends are geniuses (genii?)
Glad we could be of help.

Vince
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