93 GC Limited Electrical Problems - JeepForum.com
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post #1 of 3 Old 05-07-2013, 12:47 AM Thread Starter
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1993 ZJ 
Join Date: May 2013
Location: Kamloops
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93 GC Limited Electrical Problems

Hello fellow Jeep owners,
I currently own a 1993 Grand Cherokee 5.2l Limited. Right from day one my GC has had some mysterious electrical problems that, to this day, still manage to mystify me. Everyday I start my Jeep the VIC says there is a rear light failure, although all the rear taillights seem to be working perfectly fine. Recently, the interior lights in my jeep have continued to stay on even thought all the doors and hatch are tightly closed, and my (gauge cluster/interior light dimmer slider) switch is in the off position. The final problem is to do with the temperature gauge, the temp gauge only seems to work(needle moves reads the temp/ which is usually a bit higher than the actual temp) when the brake pedal is being applied, as soon as you take your foot off the brake the needle instantly starts to fall back to zero and stay there. I don't know what to do/try, HELP would be greatly appreciated, thanks.

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post #2 of 3 Old 05-07-2013, 04:20 PM
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2000 TJ Wrangler 
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Posts: 2,857

I'm gonna take a wild shot at a few of the problems. As for the lights...did you check the back of the switch? Possible that the connections are not the best anymore. Which this is probably similar reasoning to your VIC issue (do a search and you'll see all the fun things the VIC does and how to fix).

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post #3 of 3 Old 05-07-2013, 07:00 PM
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1994 ZJ 
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Posts: 2,665
Welcome to JF!

Verify both bulbs are working for the center brake lamp.

Locate the Lamp Outage Module (LOM) behind the small removable panel near the lower-left corner of the hatch.

Bypass the LOM by unplugging both connectors and plugging them together.

If you still get the Rear Lamp Failure message, then most likely bad solder joints in VIC. If no message, then perhaps a bulb problem (including wrong bulb type). Less likely is a faulty LOM.

Verify the dimmer slider is NOT fully right which turns on courtesy lamps.

Verify proper operation of door pin switches. Possibly not pushing in far enough. Tape a coin to each door lined up with the switch and try it.
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