98 TJ right turn signal stays lit with headlights on - Jeep Wrangler Forum
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Old 03-29-2016, 08:47 PM
Thread Starter
Join Date: Jun 2010
Posts: 66
98 TJ right turn signal stays lit with headlights on

I have a 98 TJ. The front passenger side marker light does not light up.

What I have done so far.

Checked bulbs and fuses. Put in new bulbs.

Cleaned the front light grounds with a wire brush and emery cloth.

Replaced front drivers side marker light socket. The contacts snapped off when I tried to clean them up. Tried swapping the new socket to the passenger side. No marker light. Passenger (old socket) side light socket/bulb worked just fine when swapped into drivers side fender. When I turned on the flashers only one filament in the bulb lights up. Both light up when swapped over to the drivers side.

The multifunction/turn signal switch was not self canceling so I replaced it.

Right turn signal was flashing rapidly so I replaced the flasher relay. The right turn signal now flashes at a normal rate.

Removed the rear tail light assemblies and cleaned up the three bolts inside each light. I also took the wire brush to the metal plate. Before doing this the right rear brake light was not as bright as the left. Now both are the same brightness. As I reinstalled the right rear tail light to the body of the jeep the lower left screw screwed in fine but I could not make it tight.

I do not have any LED lights on the jeep. I have not installed any stereo equipment. I installed a new alternator but the light was acting up before this.

Does anyone know what size the six tail light bolts are? Are they the same size bolts for the front headlight grounds? I picked up some #10 sheet metal screws at Home Depot but they were loose inside the holes.

I wanted to inspect the right rear tail light wiring harness connector but there wasn't enough slack to get the connector out of the body. Is there a way to help it from the other side?

Well, thanks for reading through this long post and thank you for any and all help you may be able to offer.

Cheers, John

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Old 03-31-2016, 04:11 PM
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Join Date: Jun 2010
Posts: 66
Really? No suggestions? Can someone explain how to use a multimeter to diagnose a bad ground.

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Old 03-31-2016, 05:12 PM   #3
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Join Date: Mar 2008
Location: where I wheel: N 45º 36.663' W 123º 20.935'
Posts: 3,136
You may need to change out your multi-function switch again. I believe I replaced mine for under $35. The one you just replaced may be defective out of the box.
1998 TJ Moss Green Sahara w/ numerous scratches & dents whose playground is on a tropical island that's 33 miles long and 4-12 miles wide, in year-round 82 degree weather

Edit: "Now jeepin in Oregon"
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Old 03-31-2016, 08:02 PM   #4
Join Date: Apr 2013
Posts: 13,016
The one I got from autozone was crap but the used one I pulled from
An XJ fixed me up

The aftermarket multifunction switches are a crap shoot at best but the XJ are fixed roof so theirs hold up better as the never get exposed to the rain
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Old 04-01-2016, 12:39 AM   #5
RUBI 4 MY MRS's Avatar
Join Date: Feb 2011
Location: Trails of Nevada
Posts: 3,337
A bad bulb or socket on the front park/signal light (not the side marker) will cause the indicator to stay on solid when the headlights or parking lights are on. That also can cause the side light to not work. Try swapping front bulbs & cleaning or replacing the socket. The side marker light needs to ground through the “other” filament of the front light bulb so a bad contact at the socket or burnt out filament will cause this.

'05 Rubi TJ Unlimited
'93 Toyota 4Runner
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Old 04-02-2016, 12:12 AM
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Join Date: Jun 2010
Posts: 66
An update. Turns out the multimeter I was using to test things isn't working properly. The multimeter I got for free from Harbor Freight worked just fine. Today I snipped the black ground wire about three inches away from the socket connector and spliced in a new wire using a waterproof butt connector. This cured the issue of the front marker light not lighting up, but did not cure the directional dash light staying on when the headlights are on. The directional light also ceased functioning after running the new ground cable and the side maker/signal bulb was very dim. By sheer chance I discovered that wiggling the black and yellow wire that comes out of the front marker light connector cured the dim side light and the always on dash light. I ran out of daylight today so I didn't have a chance to run a new black/yellow wire from the front light connector to the side light connector. I hope this helps others who are going through the same light issue.
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Old 04-03-2016, 12:13 AM   #7
Join Date: Jul 2011
Posts: 1
I have the same exact issue. Please post and let us know if this fixed your issue.

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