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Originally Posted by bigdog
Just checked my trailer lights and noticed an issue.
The traiiler "running lights" do not come on, when I turn on SUV headlights ? All lights of SUV working, no issues.
Trailer "directional" lights working properly. Trailer "brake" lights work OK.
If it were just the bulbs, then it would have to be bulbs on "both" sides of trailer ? I also have "side mounted" lights on trailer, and they do not appear to be working either ?
Any ideas, why the trailer "running lights" are not working?
Thanks in advance!
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If you are mechanical at all, the first thing you need to do is determine if there is power for the running light circuit at the rear trailer plug on the vehicle. You can either use a 12 Volt test light or a voltmeter/tester. Once you've determined that, we can help you from there. Also, the type of vehicle and whether or not it has the factory towing package will be helpful info. (GM has a specific issue in late model vehicles with the tow package)
Blue Thunder