Mechanics

MAJOR POWER DRAIN?

Jeep CJ7

Jeep CJ7 1986 68k miles with a Chevy 350.

Started it up this morning, the engine fired up fine sputtered and stalls (like it does every morning the Choke needs a little fiddiling usually)

I turned the key to the off position and noticed my voltmeter was still displaying 12 volts (it's hot to key normally) I made sure the key was out and I watched the volts sink (rapidly: 30 seconds from 12v - 0v)

Key in turn the igntion no power anywhere in the vehicle. I didn't have my multimeter handy so I couldn't check on the battery volts, but there was no power anywhere in the vehicles and when I removed the battery cable there was no sparking or anything so I assume it's dead.

Here's the relative age of everything electrical in the engine box: distribtor was replaced in it's entierty 2 months ago along with the plugs, wires, coil. The starter is 1 year old along with the battery (it's a high quality gold top type).

I was already late to work so I didn't get a whole lot of time to diagnois the problem. My idea is faulty ignition switch in the steering column, so that and the soleniod (which is at least 4 years old are my fist steps) any ideas?
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Bad_karma06
April 6, 2007.



I think it's rejecting the Chevy 350. Or the 350 is rejecting the jeep body. Different blood types! No did you see or smell any smoke? Sounds like a heavy primary wire burned. Or in internal short in the regulator.

Merlin2021
Apr 6, 2007.
No smoke and I made a quick cursory inspection of the major power feeds (battery cables, connection to the starter, selonid, etc) and I'm pretty sure everything's intact. Right now I'm leaning towards your though on the regulator (bad diode maybe?) Which is built into the alternator, or maybe a masive short internal to the battery cells. But agian I feel like that's something I would have smelt / seen.

And as for blood type.I figure both were USA made how could you go wrong? : )

Tiny
Bad_karma06
Apr 6, 2007.
If in doubt check it out! Most parts suppliers will test both for you!

Merlin2021
Apr 6, 2007.