Join Date: Dec 2001
Location: Denver, Colorado
LOL, I did the samething tonight trying to hook up a set of new driving/fog lights on my new to me Arb bumper. The samething happened except I had not tightened any of the nuts & bolts down on the bracket. The light worked just fine until I moved the light around a bit & it started sparking a bit. I just thought that since the metal braket was grounding & ungrounding causing the spark. Wrong! I tightened everything up & bamm! The fuse blew. Yes it is a fuse. There is a fuse & relay for the fogs. 15 amp & it's in the fuse box under the hood right behind the battery. It's a yellow one. It's dark now, but I think it's the upper right yellow 15 amp as your standing against the fender looking at the box. The relay is there too. It's "H" relay.
Now for the strange short. I made sure that the black wire (ground) from the stock plug went to the ground wire(black) of the(metal) body of the light & the blue wire(hot) whent to the white wire(hot)(lamp). It should not be any different than the stock setup but for some reason it is.
This is my theory: The differance between the new light & the stock light is that the bodies are different. THe new light is metal & the old factory light is plastic. THe body of the stock light NEVER grounds to the body of the jeep & the new metal one does. I think for some reason the metal body cuases a loop of some sort & that's the short. It does not make sence to me but tommorrow when I get some more fuses I'm going to NOT hook up the black wire frome the stock plug. Just the hot wire will be used. It will already be grounded by the metal to metal. Now I'm sure someone who knows more about these things could explain WHY this happened but I'm pretty sure of the cause. It also might be doing this because of the relay that's part of the circut. I don't have any experiance using relays so if I'm right then that's why.
ZJ 98 5.9 LTD. Lots of mods. 7" T&T's Long Arm Lift ,BFG KM2"s,35X12.50x16's,4:56's, Vanco brake upgrade, M1intake,Holley52mmTB,MikeLeach Headers,, Arb'ed HP D30,Aussie Locked rear,Procomp MX6 Shocks,Arb front,RearTR bumpers,ECT.ECT.
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