Amber side markers are not operating.
There is 12 volts coming from the truck for on the same circuit are the tail lamps and red markers which are working. I checked all 4 ambers bulbs with a continuity meter and they are good. I have n...
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The lights are in parallel and one bad bulb will not take out the entire string like cheap Christmas lights. The trailer DOT lighting is powered and fused by the tow vehicle. The junction box is on or just rear of the tongue of a bumper pull and close to the pin on a fifth wheel.
