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Old 07-10-2018, 03:19 PM   #1
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Cruiser wiring

Just developed problem with my running or courtesy lights.Left and right signal lights work,brake lights also work.Orange Leds on front cap work.None of the marker or running lights work.Also no problem with trucks lights.Suspect ground problem but how do I check for it.Any suggestions please
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Old 07-11-2018, 06:06 AM   #2
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Assuming all your bulbs and truck fuses are good, I would start at the truck connector. If that works, you just have to trace the wiring through the trailer. Maybe someone else has some tricks.
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Old 07-11-2018, 08:06 PM   #3
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Run a jumper wire or a paper clip between connector 4 and connector 3 (as shown in the attachment) on your trailer plug. The running lights should illuminate if there is no problem on the trailer side.
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