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Unread Yesterday, 11:19 AM   #1
jd21476
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Grounding the dash and speedometer

My fuse keeps blowing for my dash lights and after looking around on the forums and talking to a few of you I think it may be a bad ground for my speedo. All my other lights work and I know hte dash lights work because they come on for a quick second before the fuse blows.

It looks like I can unscrew one of the nuts on the speedo and run a dedicated ground from the back of the speedo to a good ground point.

1. Will this work to override the short?

2. If so, What size wire shoud I use for this ground?

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Unread Yesterday, 02:51 PM   #2
PERK
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adding a ground will not help a short. you have something hot already grounding out. you need to find that.
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Unread Yesterday, 03:03 PM   #3
Renegade82
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^^ ditto that. You have either a ground touching a hot wire or a hot wire touching ground. You need to trace some wires within that circuit.
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Unread Yesterday, 04:48 PM   #4
jd21476
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Do you think I shoudl start by pulling my speedometer? It doesnt sound too difficult
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Unread Yesterday, 06:13 PM   #5
Matt1981CJ7
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I'd start by tracing every orange wire under your dash, looking for any burns, cracks, or exposed wire filaments.

Matt
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Unread Yesterday, 06:13 PM   #6
Renegade82
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I don't know the difficulty of your situation/Jeep but the best way would be to remove the dash screws and put in 2 longer smooth shouldered 3 1/2 or 4" bolts (5/16" I think) at each top corner so you can slide the dash out for access. Then examine what you got hiding and look for loose or chaffed wires. Your speedo lights just pop out of the housing so no need to remove the whole unit. And if I remember correctly all the dash lights are on one circuit daisy chaining around between your 3 gauges and 4 hvac lights.
The downside is if you have a dash pad then you also have to lower the windshield to remove it, in order to pull the dash out. Otherwise you have to contort yourself to get behind the dash.
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Unread Yesterday, 09:10 PM   #7
jd21476
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Part of my issue is the PO installed a full roll cage, which is nice but limits my options for pulling the dash pad or sliding the dash out without removing the entire cage.
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Unread Yesterday, 09:33 PM   #8
Renegade82
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Well that sucks. Then I guess you'll just have to get a mirror, flashlight, and do some stretching and like Matt said, follow the circuit which is all orange wire for the feed side.
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Unread Today, 04:57 AM   #9
John Strenk
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I still think you should check the headlight switch first. Those rheostats have a tendency of falling out and shorting.





It would be the easiest first step
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Unread Today, 09:38 AM   #10
turbogus
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That's a great tip John!
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