help with a short - JeepForum.com
 
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post #1 of 7 Old 06-09-2015, 11:01 PM Thread Starter
BaileysZJ
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1994 ZJ 
 
Join Date: Dec 2014
Posts: 129
help with a short

OK so I was driving home from work the other night and I heard a small pop and my dash lights went off. (it was obviously a fuse) so I figured no big deal ill change it soon enough. Replaced the fuse and when I turned on the headlights it immediately blew two more times. I know this generally means that there is a short in the parking lamps and automatic headlamp systems but where do I start? would I be better off searching by hand or buying some sort of power probe device that "tells" me where a short in a wire is. Any advice is greatly appreciated! P.S I added some basic info to my profile so if you have any questions don't hesitate to ask! thanks, BaileysZJ

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post #2 of 7 Old 06-10-2015, 01:15 AM
jnicewan
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1995 ZJ 
 
Join Date: Dec 2010
Location: Norman
Posts: 2,348
Does it pop the fuse when headlamps come on, or park lamps? Seems like it would be the park lamp fuse since you lost the dash lamps. Check trailer wiring first if you have any under the rear bumper. Might have to pull lamp lenses and inspect wiring and bulbs too.
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post #3 of 7 Old 06-10-2015, 01:44 AM Thread Starter
BaileysZJ
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1994 ZJ 
 
Join Date: Dec 2014
Posts: 129
It's when I turn my headlights on, it immediately pops. My headlights and taillights work. However when my taillights should be constantly on because the headlights are on they aren't. Also my shift instrument panel, HVAC panel, and gauges are dark.
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post #4 of 7 Old 06-10-2015, 10:22 PM
jnicewan
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Join Date: Dec 2010
Location: Norman
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Well, without going through the vehicle and finding connectors in the harness it might be easiest to start unplugging bulbs related to the problem. Since the fuse blows when turning the headlamps on and not park lamps I would start with inspecting the headlamp bulbs and harness, may sure pins/connectors are good and not melted. If there isn't an obvious problem see if the fuse blows with bulbs disconnected then if needed try plugging in one at a time and checking fuse. If fuse keeps blowing with bulbs disconnected then you need to start going back through the harness all the way to the switch. Look for pinch or rub areas, or areas near damaged body panels, modified parts or aftermarket parts.
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post #5 of 7 Old 06-11-2015, 10:35 AM Thread Starter
BaileysZJ
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1994 ZJ 
 
Join Date: Dec 2014
Posts: 129
Hopefully the bulb trick works. I'm going to try doing that today
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post #6 of 7 Old 06-11-2015, 04:12 PM
howdyratz
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1997 ZJ 
 
Join Date: Mar 2015
Posts: 90
I've seen water in lamp assemblies short like this too.

Keep an eye out for a soggy lamp assembly. They shouldn't be.
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post #7 of 7 Old 06-13-2015, 10:11 PM Thread Starter
BaileysZJ
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1994 ZJ 
 
Join Date: Dec 2014
Posts: 129
Got it fixed!! Turned out to be a fuel pump relay. After trying all the bulbs and connections I could possibly find (even to the ashtray). I don't know how or why it was a relay for the fuel pump but I'm just glad it's fixed so I can drive at night
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