post #1 of Old 04-30-2012, 12:37 PM Thread Starter
Lesley
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Join Date: Apr 2012
Posts: 1
Automatic shutdown relay keeps blowing.

I don't even have to try to start it just turn the key over to the accessory position and its blowing the fuse. HELP!

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post #2 of Old 04-30-2012, 05:17 PM
neonhomer
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1996 ZJ 
 
Join Date: Sep 2010
Location: Edgewater, FL
Posts: 470
You sure it's accessory, and not On?

I kept popping PCM fuses at random. Couldn't figure out why until I looked under the Jeep. The downstream O2 sensor wiring had come loose, and was rubbing on the transfer case slinger, and rubbed a hole in the insulation. When it hit metal, it popped the fuse.

You likely have a short somewhere. The way I would start to track it is to unplug the three PCM harness plugs. Plug in one, and turn the key on. No pop? Key off, and move to the next one. If all three individually don't do it, plug in the first two. then try the last two. then the outer ones...

Outside of that, I don't know....

---------------
NeonHomer
Mid-Florida Jeep Club - Member
1996 Jeep Grand Cherokee, 4.0L/42RE/242 - Rebuilt motor w/ Comp cam (4/12), 3.5" Junkyard F>R lift, 31x10.5.x15 M/T's, Spartan Locked D44a, TC & tank skids, F&R adj trackbars, V8 steering arms
Galaxy DX99V CB, 102" SS Whip, Yaesu FT-2900R 2m, Larsen 1/4w mag mount, Sony HU, Massive 3way - F Door, Pioneer 3way - R Doors, MB Quart ONX304 Subs (x2), Lanzar 1600w amp.

"No Matter Where You Go... There You Are."
"Oh me oh my a lovely day is dawning. Oh what a joy I didn't wake up dead. So I can go to work and then resume my yawning, and get my sleep on site instead of in my bed" - Daria Morgendorffer (with my twist)
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