Question about 1998 Toyota 4Runner

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1998 4runner trailer light wiring not working

I have a 98 4runner with factory towing package. Never tried it until last week. Hooked up to trailer with lighting system that I know works (tried on another vehicle already). Tail lights work but no brake or turn signal function on trailer. Checked power coming out of the flat 4-pin pigtail from the 4runner. Power coming through the tail light wire but none through the other 2 leads (R & L turn signal/brake wires). The wiring under the 4runner looks intact as far as I can trace it.

My suspicion is that the factory installed converter is not working but I don't know where it hides in the 4runner or if I can fix it myself. Advice or suggestions appreciated.

Thanks mucho. B

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I recommend that you tighten the ground wire screw for starters. since the vehicle is ten years old corrosion may be the culprit.

Posted on Feb 01, 2009

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