I have a '04 F250 and the trailer's brakelights and turning indicators don't work, truck is fine. Trailer brakes work fine, just no stop/turn. The problem has been traced forward of the pigtail. All fuses under dash are fine. Can't find the fuse block under hood. There's no block, just harness connectors. What to try to check next.......
You will need to get a 12 volt test light and check the trailer connector for a voltage signal to the trailer, it may also have seperate fuses under the hood for the trailer lights if the system is factory installed, federal law requires the 2 systems be isolated, if there are blown fuses find the short in the trailer before replacing fuse(s), with no exceptions the short is always in the trailer. Hint, check the fuses 1st.
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I need to know which fuse is for the trailer lights, in the box under the hood.
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I am checking with a voltmeter.
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