Headlights randomly shutting off - JeepForum.com
 
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post #1 of 5 Old 05-03-2021, 07:53 PM Thread Starter
BC904
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Headlights randomly shutting off

While driving my 2014 Jeep GC Summit at night, the headlights will intermittently shut off. It seems to be getting more frequent as of late. I have attempted to diagnose it by turning the switch from “auto” to the “headlights” setting. But both positions cause the problem. I have a couple of busy weeks coming up and will be unable to make it to a dealership before then. I thought I would throw this out to the group to see if any of you have any ideas or have even heard of this. BTW, I have the lifetime maxcare warranty. TIA.


Greg
2003 Jeep GC Overland (H.O. 4.7)
2014 Jeep GC Summit (Hemi)
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post #2 of 5 Old 05-03-2021, 09:51 PM
ColdCase
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The Summit has HIDs. When the ballast or bulbs get marginal, the bulbs can lose their arc and shut off. Turning the lights off then back one kicks them into a high voltage startup that gets the arc going again. You could look for what looks like burned connections or overheated ballasts. Often a bulb change will fix it for awhile. Are they the original bulbs? I think there is a thread around here someplace. If no one jumps in here by the time I get back I'll try to look for it.

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post #3 of 5 Old 05-04-2021, 10:25 AM Thread Starter
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Yes, they are the original bulbs. Is the ballast you talk about part of the bulb assembly, or a separate part located elsewhere?

Greg
2003 Jeep GC Overland (H.O. 4.7)
2014 Jeep GC Summit (Hemi)
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post #4 of 5 Old 05-04-2021, 11:38 AM
ColdCase
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On early models there was a ballast under both headlight assemblies, dunno about the 2014. You may find TIPM codes if you have a OBD scanner that can read body modules. Given both seem to be going out, I'd check wire harness power and grounds for a bad connections. I'm not sure if the 2014 has a circuit breaker built into the TIPM that will trip and automatically reset when it detects an over-current or short. There is a lighting description around here somewhere, I'll have to check it to refresh my memory.

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Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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post #5 of 5 Old 05-05-2021, 08:54 AM Thread Starter
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Thanks for the info.

Greg
2003 Jeep GC Overland (H.O. 4.7)
2014 Jeep GC Summit (Hemi)
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