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Old 10-14-2018, 08:31 AM
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Turn Signal/Parking light Issues...Help!

Hi guys,
Long time reader, first time poster! This forum has been great, a lot of good info. I've tried searching for my particular issue but couldn't figure it out unfortunately.

My front passenger turn signal has been giving me all sorts of issues. It started hyperflashing occasionally so I figured it was the bulb. The strange thing is it would always work the first time I used it and never the second time. So the first time I'm leaving my house and taking a right, it works fine. Next right turn it would do the super fast blinking signifying that it wasn't working.

Changed the bulb. It's fixed! Or so I thought. Now it works 9 times out of 10 with the headlights off and 0 out of 10 with the headlights on! Doesn't have to be the headlights, could be just the parking light. So I figured ok it must be the multiswitch stalk on the steering column. Replaced that the other day but no change.

I've tried swapping bulbs and swapping light sockets but the problem is always on the passenger side. I've tried unhooking the headlights thinking maybe it was drawing too much power somehow but no. I've checked the ground wire behind the passenger headlight and it looks fine, wiped it down a bit too but no. I used a multimeter to check the power at the wires and it seems fine but admittedly I don't know what I'm doing when it comes to electrics. Nothing has changed in my setup, everything is stock.

Any ideas or thoughts on what I should try next? I truly appreciate any help or input. Thanks!!

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Old 10-15-2018, 08:16 AM
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I read that theres no fuse for the Jeep JK headlights/parking lights which is interesting. I was going to check the fuse but apparently there isn't one. Anyone have any guesses as to what I should try next?

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Old 10-15-2018, 12:40 PM   #3
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Pretty strange one. The fact that it is repeatable should help, but man that's strange. My guess would be something to do with a ground somewhere. May not be the one closest to the problem, keep in mind. That or a connector somewhere. Just guesses, really.
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Old 10-15-2018, 12:46 PM   #4
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You didn't give much info about the Jeep and don't have any info in your signature. I would then guess that it is an older Jeep and no longer under warranty. If it is still under warranty, take it to your dealer and let him work it out.
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Old 10-15-2018, 04:11 PM
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Quote:
Originally Posted by rgreen65 View Post
You didn't give much info about the Jeep and don't have any info in your signature. I would then guess that it is an older Jeep and no longer under warranty. If it is still under warranty, take it to your dealer and let him work it out.
It's a 2008 jku Sahara auto 4x4. Definitely not under warranty! Actually has had no problems up until now. This and egr valve
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Old 10-17-2018, 09:05 AM
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Anymore ideas or troubleshooting tips? Thx
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Old 10-19-2018, 08:52 AM
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Working on it today if anyone has any ideas. The parking light on the passenger side doesn't work. The blinker on that side does (same bulb). So I'm assuming it's a different wire. Anyone know? Is there a fuse I should be looking for?
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Old 10-19-2018, 09:05 AM
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The side marker on that side was all corroded if that helps. I unplugged it and swapped it with the driver side one but doesn't help. Could that corroding over time cause damage to the other lights in that chain?
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Old 10-19-2018, 09:31 AM
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There's 3 wires going to the parking lamp. Black is probably ground. Anyone know which is for turn signal and which is for parking light?
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Old 10-19-2018, 09:43 AM
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I found another post that said the middle one is the parking light. I'm going to try and trace it all the way back to the source and see if I can find anything suspicious
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Old 10-19-2018, 10:19 AM   #11
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You need one of these:
https://www.autozone.com/test-scan-a...ter/989209_0_0

While this is Autozone, other auto stores should also have them. Prices may vary a lot. I have seen them from $6 to over $20. These are invaluable for tracing a wire. With the blinkers on, start with the wire right behind the connector in your photo. The clip goes on any grounded metal and then gently pierce the insulation on the wire. Be careful, going through the wire hurts - not the wire, your finger underneath.

The side marker being corroded is a concern as that means you have water infiltration into the socket - something that should not happen. However, it should only affect that socket. I had an issue on a 2006 Ram 2500 when I cracked the lens, and water got into the housing and affected all three sockets. Fortunately that was a replaceable part along with the housing. You may want to check on the lens on that side.

If there is no fuse, then it has to have a circuit breaker. The parking lights will be on a separate circuit from the headlights as will the turn signal. You did not comment on the rear turn signal, so I assume that would be blinking fast as well. If the rear turn signal blinks, it is not the multifunction switch (which you already know). Save the old one, as they do go out, especially if you have factory fog lights. I have the part to replace the one in my TJ because of the fog light switch.
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Old 10-19-2018, 05:37 PM
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Quote:
Originally Posted by rgreen65 View Post
You need one of these:
https://www.autozone.com/test-scan-a...ter/989209_0_0

While this is Autozone, other auto stores should also have them. Prices may vary a lot. I have seen them from $6 to over $20. These are invaluable for tracing a wire. With the blinkers on, start with the wire right behind the connector in your photo. The clip goes on any grounded metal and then gently pierce the insulation on the wire. Be careful, going through the wire hurts - not the wire, your finger underneath.

The side marker being corroded is a concern as that means you have water infiltration into the socket - something that should not happen. However, it should only affect that socket. I had an issue on a 2006 Ram 2500 when I cracked the lens, and water got into the housing and affected all three sockets. Fortunately that was a replaceable part along with the housing. You may want to check on the lens on that side.

If there is no fuse, then it has to have a circuit breaker. The parking lights will be on a separate circuit from the headlights as will the turn signal. You did not comment on the rear turn signal, so I assume that would be blinking fast as well. If the rear turn signal blinks, it is not the multifunction switch (which you already know). Save the old one, as they do go out, especially if you have factory fog lights. I have the part to replace the one in my TJ because of the fog light switch.
Thanks I'll probably pick up a test light just to double check my work but I used a multimeter and I cut a slit in the wires before the socket on both passenger and driver sides and I'm getting 11.6v on the good side and only 7.7v on the bad side. I even touched the bulb contacts to the slits I made in the wires (thus taking the socket out of the mix) and it worked on the good side but not on the bad side. The voltage wasn't enough to light the bulb. So now I don't know what to do. Has to be something farther up the chain and the only thing there is the engine harness where all of the light wires meet
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Old 10-22-2018, 05:20 PM
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Just wanted to report that the test light shows it's a bad ground somewhere. The black wire going to the parking light/blinker socket is bad. Confirmed by putting needle to black wire socket and other end to battery positive. If it was a good ground (like the driver side) it would have lit up. Now I need to trace back to where that black line meets up
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Old 10-23-2018, 04:59 PM
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All fixed. Spliced into the side marker negative wire and the parking light and blinker are now working! Hopefully this helps someone else who is troubleshooting blinker issues. Get a test light!
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