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Old 02-13-2008, 09:29 PM   #1
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Exclamation i am stumped please help

i have a 2003 wrangler x 4.0L and my dash lights my side lights, and my tail lights dont work. the brake lights DO work. i thought maybe a fuse was blown. sure enough it was (# 1 20a fuse). after i replaced it my dash lights and every thing else was working. two seconds later dash lights went out along with the side lights and tail lights. and when my engine is off and the door is open with the lights on it does not beep to warn me that i left on my lights.

the following does work. brake lights, head lights, fog lights, turn signals, four way, high beam, dummy light, fog light on light, high beam on light, arrows for turn signal, seat belt light, and all the warning lights that normaly come on when the jeep just starts. any help would be great thanks

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Old 02-13-2008, 11:50 PM   #2
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sooo you keep popping that fuse? if so you have a short somewhere. start tracing those wires.

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Old 02-14-2008, 01:20 AM   #3
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When I got my jeep none of the lights worked either. Heres my solution

1. Check all fuses(none were bad)
2. Replace light fuses anyways(nothing changed)
3. Let 2 days go by and everything will start to work and never stop working again
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Old 02-14-2008, 07:56 AM   #4
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sooo you keep popping that fuse? if so you have a short somewhere. start tracing those wires.
x2 Has to be a short.
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Old 02-14-2008, 03:13 PM   #5
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ok i will need to get a wire diagram and then go from there.
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Old 02-14-2008, 05:01 PM   #6
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Could be a loose ground.
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Old 02-14-2008, 05:44 PM   #7
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Would a lose ground pop fuses? When i hear about fuses consistently failing it's usually a short
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Old 02-14-2008, 05:52 PM   #8
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Would a lose ground pop fuses? When i hear about fuses consistently failing it's usually a short
Yes, depending on the load and the size of the fuse. Making and breaking a circuit under load can spike the voltage.
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Old 02-14-2008, 07:31 PM   #9
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i think i may have found my problem. everything that is not working is on the multi function switch. it has a pink/red wire going from the fuse to the switch and from the switch is a black/yellow wire to the left rear quarter panel near body grommet. my question is were is the function switch is. i was wondering if any of you might know.

my brother wanted me to point this out, a voltage spike will not blow a fuse that is way they are rated in amps.
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Old 02-14-2008, 08:46 PM   #10
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A short to ground will cause the fuse to blow. It causes less load on the circuit allowing more amperage and voltage to flow through the fuse blowing it. This is kind of a simple explination. I can go into more detail if you like. It all has to do with ohm's law. Now my theory. In the TJ's everything is wired through that multifunction switch. I do not know why it is a dumb idea, ut random things can happen when the honeycomb switches in side that switch corrode and touch each other. Whenever I hit my brake my left turn signal comes on, I am just to lazy to swap it out. On my buddy's TJ, whenever he hit his turn signals the radio would go on and off. WTF? Thats what I said, but that would probably be your best bet, If you cant find anything else.
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Old 02-14-2008, 09:09 PM   #11
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i think i may have found my problem. everything that is not working is on the multi function switch. it has a pink/red wire going from the fuse to the switch and from the switch is a black/yellow wire to the left rear quarter panel near body grommet. my question is were is the function switch is. i was wondering if any of you might know.

my brother wanted me to point this out, a voltage spike will not blow a fuse that is way they are rated in amps.
After 26 years of doing electrical work I pretty sure I know what will cause a fuse to blow.

Thanks
Rob
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Old 02-14-2008, 09:15 PM   #12
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well im not even 26, but i am an electrical engineer and i agree with him.
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Old 02-14-2008, 09:39 PM   #13
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well im not even 26, but i am an electrical engineer and i agree with him.
Well, a short does not cause less load. It increases the load. Turn on all the accesories in your jeep, lift the ground, see what happens, then put the clamp back on under load, see what happens.........the surge from the load will cause an arc (voltage spike) and the momentary load will spike also until the connection is able to carry the load properly. The best thing an EE can do in his carrer is go into feild (work in the trade) and see first hand some of the electrical problems that can occur that they dont teach you in school. I've had engineers on the job who will swear up and down that what they just saw was not possible.
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Old 02-14-2008, 09:47 PM   #14
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Yea you know what I mean. I was a nuclear engineer in the navy, but I am in school now for chemical engineering. My job title is just electrical engineer, maybe I need to brush up a little bit. Good thing I only work on fans, and I am the low guy on the totem pole. I make things work the safety engineer and real electrical engineer make things work so they dont kill people.
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Old 02-14-2008, 10:44 PM   #15
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After 26 years of doing electrical work I pretty sure I know what will cause a fuse to blow.

Thanks
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x3, I'm 17 and I know it!
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Old 02-16-2008, 11:42 PM   #16
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yes electricity can do some crazy things. i am not trying to short out my entire electrical system. but does anyone know were that switch is. i am just about to give up and take it to the dealership.
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Old 02-17-2008, 05:06 PM   #17
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The switch is the multifunction switch that controls you turn signals and high beams etc. It is relativly easy to replace I belive you noticed a wire or something goin to it I cant look at the last posts while writing this, but that is the one that everything in the jeep is wired through for some reason.
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Old 02-17-2008, 05:07 PM   #18
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That is the actual switch everything is built in to that.
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Old 02-18-2008, 10:04 PM   #19
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turns out it was not the switch. it was the drivers side front turn signal. the socket had sorted out. somehow water had gotten into the connector and killed it. i had just thought that the light just blew until i took apart the assembly. man i tell you, you could really smell burnt electrical parts. i tested the female end of the assembly and there was no continuity (sp) on it.
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Old 02-19-2008, 08:33 PM   #20
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i got the harness and the socket ordered hopefully it will be here on thrus.
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Old 02-20-2008, 12:17 AM   #21
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I hope you know local auto stores such as autozone have those for 1-2 bucks.
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Old 03-09-2008, 09:03 PM   #22
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i forgot to tell yall. i got my jeep fixed it was just the socket. somehow the harness was not taken out with it.
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Old 03-13-2008, 01:06 AM   #23
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Thanx for the follow up!
C.

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