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Old 03-28-2010, 03:00 PM   #1
Join Date: Mar 2008
Posts: 3
Left turn signal problems with lights on

I have a 2001 Jeep Wrangler Sport 4cyl.
When I have my headlights on the left turn signal does not flash, with the headlights off the left turn signal flashes but so does the odometer . Right side works fine. I replaced the left multi-function switch this did not fix it. Checked the ground at the tail light, cleaned up bolt threads and body threads still not fixed. Can any one help here??
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Old 03-28-2010, 03:36 PM   #2
jwm1986's Avatar
Join Date: Dec 2008
Location: Evansville, IN
Posts: 1,025
May be something in the flasher module. That is similar to what mine is doing after a full LED conversion.

2000 Jeep Wrangler Sport
4.0L / 5spd
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Old 03-28-2010, 04:13 PM   #3
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Join Date: Jul 2008
Location: NW, NJ
Posts: 4,043
You may have a bad or incorrect bulb somewhere. Buy one of each and start replacing each bulb and testing it. It's a small investment and you will need them one day anyway.
Retired my 94 YJ 4cyl 5spd @ 200K
Now in a 04 TJ 4cyl 5spd CV @120K+
Both as a commuter vehicle in NW, NJ
April 2012.downsized and now a 99er.
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Old 03-28-2010, 06:26 PM   #4
Join Date: Mar 2008
Posts: 3
I have replaced the Left tail light bulb but no luck and I have had this jeep for 3 years and no other bulb has been replaced to cause the problem. Maybe the relay next??
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Old 03-28-2010, 06:47 PM   #5
Join Date: Jan 2010
Location: Rock Hill, S.C.
Posts: 175
You have three other bulbs on that circuit, two side markers and front and rear turn signal. Check them all, this sounds like a bulb or corrosion problem.
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Old 04-03-2010, 06:17 PM   #6
Join Date: Mar 2008
Posts: 3
Problem turned out to be the factory 4 prong flat plug for trailer hitch was shorted at plug. Disconnected that and all is good. Thanks for everyone's help.
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Old 06-14-2011, 09:23 AM   #7
Join Date: Sep 2010
Posts: 10
I'm having the same problem but with my right turn signal on my 99 wrangler. Where is that 4 prong flat plug located at?

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