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2006 Ford F 250SD 5.8L engine. No turn signals, break lights, or flashers. "TBC Fault" when pressing the brake pedal and no trailer connected. All fuses under the dash and under the hood are OK. Wiring and trailer plugs do not seem to show any shorts. What's up Doc? Thanks.

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  • ALFRED DOBKOWSKI
    ALFRED DOBKOWSKI May 16, 2010

    thanks, but I checked for visible shorts in the wiring. I will try a lower amperage fuse.What short could affect all three at the same time. Could this contribute to a slow drain on the battery also?

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Hello,

Thanks for using FixYa. Looks like you are having a relay problem. I suggest that you go ahead and try to replace the relays for the turn signal and break lights. If this doesn't help, you'd probably want to get a multimeter to check for any shorts. Try using a fuse with lower amperage for the turn signal and break lights. See if they blow up. If they do, you've just isolated that you have a short in the wiring system.

I hope this helps. Thanks and good day.
HotRatchet

Posted on May 16, 2010

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