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The trailer lights don't work when the cars park lights are on but the wiring in the trailer is ok and the trailer uses a 7 pin plug and the cars trailer plug is wired to the left tail indicator light?
Wiki User
∙ 15y ago
check the ground wire on the trailer. if it is corroded at all they may not work. take a file to where the ground wire is hooked up to make sure it is on bare metal
Wiki User
∙ 15y ago
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