Question about 1998 Ford F150 Regular Cab

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Tow plug i have no brake or blinkers when hooked up to trailer. tried diferent trailer same problem. ??????? We have a travel trailer that when the trailers plugged into the truck the left turn and brake light don't work. All other lights work and it comes on when head lights are on. We can't figure it out. we have gone over every part of the wiring of the tow plug. Could it be the camper plug? I don't know. We also had to install a brake controller in the truck. F-250 it has 4 colored wires and the brake controller has the same colored wired. It said to hookem up to the same and it would work... Well it doesn't. Any help you can give me would be great. Thanks Eric in PA

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  • yadayada
    yadayada May 11, 2010

    check the underhood fuse box, if u find the trailer lights fuses blown then your trailer wiring is shorted.

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You have one of two things going on first check to see if the brake light on the left side is shorted out, it will be a 1157 bulb replace it and see if it works looking good does not mean it's good if it has a single contact then it's a 1156 bulb, check to make sure where the bulb socket is that the rubber inside the socket is not worn out and the bulb is shorting to ground. if it is buy a 1157 pig tail repair kit at any Nappa auto truck store or any trailer store. replace it if it needs it. Next if that does not fix it pull the left wheel off pull the drum off and look at the wires on the inside, if they are bare inside it's shorting out if you don't see a bare wire look at the color of the two wires and with a ohm meter and one wire disconnected from that side touch them at the plug and to ground one at a time you should have one wire going to ground one not if both wires going to the left side show they are shorted then you need to replace the wire or the electric coil. if you need more help just ask. If I can e-mail you I can send you a diagram and show you how to test if yo don't know. good luck.

Posted on May 29, 2009

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accessconnect_logo.jpg


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