Headlight Help/ 91 YJ - JeepForum.com
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post #1 of 19 Old 08-04-2015, 05:17 AM Thread Starter
Latefreight727
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Headlight Help/ 91 YJ

Headlights stopped working. The blinkers are dead as well. The running lights work but that's it. Any ideas. I didn't see a fuse for headlamps in the fuse box. Headlights are somewhat important.

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post #2 of 19 Old 08-04-2015, 07:15 AM
Que89YJ
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Did you check the fuses under the hood in the PDC?
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post #3 of 19 Old 08-04-2015, 11:01 AM Thread Starter
Latefreight727
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nope. Will check when i get home.
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post #4 of 19 Old 08-05-2015, 05:18 AM Thread Starter
Latefreight727
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The fuse is good. What else could cause the head lights and the blinkers to not work. could the multifunction switch (blinker, bright, wiper) in the column cause that? If so how hard is that to change?
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post #5 of 19 Old 08-05-2015, 12:11 PM
Que89YJ
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Has the wiring been modified? Did they both stop at the same time? Do your other lights work(High beams, hazards, brakes etc)?
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post #6 of 19 Old 08-05-2015, 05:24 PM Thread Starter
Latefreight727
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Yes, they stopped at the same time. The running lights work but no blinkers, headlights or brights.
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post #7 of 19 Old 08-05-2015, 06:56 PM
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Have you run a tester on everything under the dash to make sure you have current going all the way out to the headlights?

You can fix stupid....it's just a felony.

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post #8 of 19 Old 08-06-2015, 05:23 AM Thread Starter
Latefreight727
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I have not tested it yet. I will get the multi-meter out today. The multifunction switch feels like its jacked up. I was wondering how to get to it. Do I just have to pull the steering wheel?
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post #9 of 19 Old 08-06-2015, 06:47 AM
Que89YJ
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You need to break out the meter and check power into the light switch and the dimmer. Follow it back.
Attached Thumbnails
lighting wiring diagram.jpg  
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post #10 of 19 Old 08-06-2015, 07:00 AM
jbolty
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Quote:
Originally Posted by Latefreight727 View Post
I have not tested it yet. I will get the multi-meter out today. The multifunction switch feels like its jacked up. I was wondering how to get to it. Do I just have to pull the steering wheel?
the dimmer switch is not under the wheel, it's operated by a rod connected to the switch and is located low down on the column. It's not uncommon for the switch to be bad, loose, kicked or the rod out of place.

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post #11 of 19 Old 08-13-2015, 09:01 AM Thread Starter
Latefreight727
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Ok, I have power to the head light harness at the bulb. At the bulb there are 3 wires. A ground, white and red, and green. The green has 13.3 volts and the white and red has .3 volts with the brights off and .2 volts with the brights on. Would the regular low beam lamps not work if the high beam switch s bad. It definitely feels like the high beam switch is bad. It's really hard to cycle it on and off. That doesn't explain the turn signals not working. I will go see if I have power to the turn signals now.
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post #12 of 19 Old 08-13-2015, 09:12 AM
Que89YJ
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Are your hazards dead too?
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post #13 of 19 Old 08-13-2015, 11:26 AM Thread Starter
Latefreight727
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Nope, the hazards still work. Just the head lights and the blinkers are not working.
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post #14 of 19 Old 08-13-2015, 11:40 AM
Drednot
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my 91 has a dog hair funky buildup on everything under the dash. My dimmer switch is gunked up to where the brites will flash, but not click to stay on. The headlights, turn signals, and ignition switch are all down there on the lower column and are starting to cause grief after twenty plus years. And, the plastic turn signal switch in the column has reached beyond its design life expectancy. The more you yank on it to get the high beams to work, the more broken it feels. My hazard switch was missing which was part of the turn signal switch.


I started looking into why my hazards didn't work, and I started finding all this other stuff to where the column will come out to do a full overhaul just to make it nice. there are so many electrical components under there that can cause mayhem, its a good idea to go through everything. That's my plan at least.






91 YJ Sahara, 4.0L, AX-15/NP231, D30/D35@3.07
12 Cherokee 4x4,3.7L,42RLE/MP1522, D30M/8.25@3.73
Emission test=YES
"Non Vi Sed, Arte"
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post #15 of 19 Old 08-13-2015, 11:43 AM
Drednot
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Quote:
Originally Posted by Latefreight727 View Post
Nope, the hazards still work. Just the head lights and the blinkers are not working.
Did you try scraping the grounds on both side of the grille?



91 YJ Sahara, 4.0L, AX-15/NP231, D30/D35@3.07
12 Cherokee 4x4,3.7L,42RLE/MP1522, D30M/8.25@3.73
Emission test=YES
"Non Vi Sed, Arte"
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