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View Full Version : ford truck,trailer light help


s and s mowing
02-26-2005, 10:44 PM
i just went to napa and bought the harness that just plugs in and presto you have trailer lights.so i hooked up and parking lights work fine,but when you signal,the marker lights blink along with the marker part of taillight.then when you hit the brake the marker lights again brighten.what the hell is the deal,same trailer i had last year with a ford ranger,with the same plug type setup on ranger.somwone told me something about a heavy duty flasher on the 150.any help please

jimslawns
02-26-2005, 11:31 PM
check your ground, you are probably getting a back feed

Smalltimer1
02-26-2005, 11:53 PM
check your ground, you are probably getting a back feed

You're right, there is a loose ground somewhere in the trailer circuit.