Malfunctioning Turn Signals - Ranger-Forums - The Ultimate Ford Ranger Resource

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Old 04-30-2013
Thread Starter
Join Date: Apr 2013
Location: Pennsylvania
Posts: 2
Malfunctioning Turn Signals

Here's my issue:

A few days ago when I was driving my '94 Ranger 4x4, the turn signals stopped working. I checked them out when I returned home and here is what's going on:

When headlights are off:

-Turning on left turn signal, All signals flash, including license plate lamps and dash lights. Left signal indicator on dash works as if they're on correctly
-Turning on right turn signal, functions just fine.
-Turning on Hazards, all four flash, including dash and license plate lamps.

When headlights are on:

-Turning on left turn signal, No flash from any of them, drivers front gets a little brighter, as well. Left indicator on dash stay solid.
-Turning on right turn signal, works correctly.
-Turning on Hazards, no flash from any of them, but fronts gets brighter. Indicators bulbs on the dash stay solid.

There were aftermarket LED taillights installed when I purchased it, and Halo Projector Headlights. I removed LED tails and used a normal bulb, and no changes in the above. I switched bulbs out of all four turn signals and nothing changed, as well. The projectors are not hooked in, nor are any other accessories.
It does have a towing package, and all wires there are properly connected. I also checked all fuses and none are blown. When I replaced a signal fuse with a higher amperage one, they functioned fine for a little bit, but now they are back to the above.
I also replaced flashers, those didn't fix it either.

I know the next logical thing to do would be trace the grounds and see if any are shorted out, but I'm not very electrically inclined nor do I have a Voltmeter, so I am looking for another possible option

Also tried a new Multifunction Switch and Headlight Switch, neither of those resolved the issue.
However, if I remove the green/orange wire leading to the left rear signal, it appears as if everything is functioning correctly.

I am truly baffled as to what the issue may be. Any help would be greatly appreciated.

Thanks in advance,

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Old 05-03-2013
Thread Starter
Join Date: Apr 2013
Location: Pennsylvania
Posts: 2
Solved the issue, the harness for the trailer wiring was bad. Pulled it off and all is good again.
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