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Unread 04-29-2015, 06:05 AM   #1
RamadiRat
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1986 CJ7 
 
Join Date: Jan 2015
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86 CJ7 Headlights quit

one day all is well, next it's not. Pull the light switch out, and everything is fine except no headlights. The only fuse I see is the three amp fuse for the light switch/reostat itself...

Any other obvious things I need to check before I start real troubleshooting?

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Unread 04-29-2015, 06:26 AM   #2
Mike Romain
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Give the dimmer switch a kick and see what happens.
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86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
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Unread 04-29-2015, 06:50 AM   #3
dspec
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I 2nd the dimmer switch
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Unread 04-29-2015, 07:56 AM   #4
Jsadamson1
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Check for voltage at the wires and work your way back. Don't rely on the lights actually shining, made that mistake before. Then I recommend the headlight wire upgrade listed somewhere here on the site. My headlights never worked better or shined brighter!

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Unread 04-29-2015, 08:03 AM   #5
ThisGuyUKnow
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Most likely your headlamp/dimmer switch is bad, very common issue. You can get replacement at must auto stores.
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Unread 04-29-2015, 09:13 AM   #6
texasdave
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There is no fuse for the headlights it is built in to the switch.
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Unread 04-29-2015, 09:29 AM   #7
walkerhoundvm
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Quote:
Originally Posted by ThisGuyUKnow View Post
Most likely your headlamp/dimmer switch is bad, very common issue. You can get replacement at must auto stores.
And oftentimes not even bad - just needing a good jiggle. Better grounding, maybe?
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Unread 04-29-2015, 10:20 AM   #8
ThisGuyUKnow
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Originally Posted by walkerhoundvm View Post
And oftentimes not even bad - just needing a good jiggle. Better grounding, maybe?
No it's because of how the connections are in there they are exposed and corrosion gets between the contacts. The head lights are grounded at the grill. The switch simply passes 12v to the lamps.

If your having to jiggle your switch to get the lights to work I'd go ahead and replace it out buy a replacement to keep in the glove box.what will happen is the switch will heat up from the resistance caused by the bad connection andburn out the switch. And it will do that in the middle of the night when it's must inconvenient.

Had to sleep in the cj on i55s shoulder cause it burned out at 8pm and it was too dangerous to keep moving in the dark.

Also everything passes through your floor switch too, that can also go bad on ya and should be ruled out.
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Unread 04-29-2015, 10:29 AM   #9
walkerhoundvm
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When I bought my CJ 5 years ago - the PO said it didn't have high beams. I found the high beam switch, jiggled it, and they've worked ever since
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Unread 04-29-2015, 11:15 AM   #10
ThisGuyUKnow
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Originally Posted by walkerhoundvm View Post
When I bought my CJ 5 years ago - the PO said it didn't have high beams. I found the high beam switch, jiggled it, and they've worked ever since
Your taking about the floor switch which is separate from the dash switch.
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Unread 04-29-2015, 11:54 AM   #11
walkerhoundvm
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Originally Posted by ThisGuyUKnow View Post
Your taking about the floor switch which is separate from the dash switch.
NO, you're talking about the dash switch which is different from the floor switch which everyone else in this thread is talking about.
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Unread 04-29-2015, 12:20 PM   #12
my_304_cj7
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I 500,000th the floor dimmer. I would disagree with buying a new one until you know there is nothing that can be done for the old. I bought a replacement that didn't work from day one. I don't remember exactly what I did but I was able to get the original working and I haven't had an issue since.
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Unread 04-29-2015, 01:11 PM   #13
ThisGuyUKnow
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Originally Posted by ThisGuyUKnow View Post
Your taking about the floor switch which is separate from the dash switch.
Well last I checked the dimmer switch was on the dash as it dims your gauges. But I suppose I could be mistaken and all this time been calling the floor switch by the wrong name.
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Unread 04-29-2015, 01:39 PM   #14
Mike Romain
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Originally Posted by ThisGuyUKnow View Post

Well last I checked the dimmer switch was on the dash as it dims your gauges. But I suppose I could be mistaken and all this time been calling the floor switch by the wrong name.
Different places call it different, I for sure was talking about the floor switch that dims or brightens the headlights or high/low beam switch. They can get half on/off and need a kick or the plug can fall out or get corroded real easily being on the floor and all.
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86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com (10 new albums added Sept 16/10)
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Unread 04-29-2015, 01:41 PM   #15
walkerhoundvm
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Quote:
Originally Posted by Mike Romain View Post
Give the dimmer switch a kick and see what happens.
Did you hear about the blonde who get into an accident? She got her foot stuck in the steering wheel trying to hit the headlight dimmer one night.
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