i have the factory wiring harness 4 pin on my truck, installed by factory. and i went to tow something the other day and i noticed the running lights don't turn on the trailer but the brake lights and turn signals work. plugged the trailer into my dads car and all the lights turned on. don't know why my running lights for the trailer don't work on my truck. any ideas? fuse maby? not sure

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2004 black ranger extended cab flareside 4x4 4.0L
32" BFgoodrich all terrain t/a ko tires

There is fuse for the trailer park lamps in the side penal of the dash

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1999 Ranger 4.0 and extreme Snap-on tool fetish

You mean the SBJ on the RH side of the vehicle and at the passenger side kick panel, this is where the fuses for that circuit are at. Ford got rid of the GEM system and the CJB behind the LH door on the dashboard for his model year.

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2004 Ranger FX4 Level II, 5R55E, Sonic Blue Pearl

Proudly JAP/RICE free since March 2000

ok i will check the fuses right now and let you know if that fixes that i really hope it does.

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2004 black ranger extended cab flareside 4x4 4.0L
32" BFgoodrich all terrain t/a ko tires

so i found the fuse in the passenger kick panel it was a 10 amp fuse which was blown so i was like sweet an easy fix, so i replaced the fuse and it still doesn't work. what do i do now?

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2004 black ranger extended cab flareside 4x4 4.0L
32" BFgoodrich all terrain t/a ko tires

just want to let you know that i found the issue, it was corrosion on the parking lite wire.

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2004 black ranger extended cab flareside 4x4 4.0L
32" BFgoodrich all terrain t/a ko tires