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dol-sen

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Everything posted by dol-sen

  1. I am new to having a Porsche, don't yet have mine wired for a trailer. Typically, when a single circuit works, but multiple circuits on at the same time don't. It is often a bad ground connection. As was said, for non-led lighting, the power can backfeed through the common ground to the other light circuits. That is not enough for them all to light because the power is split to all the other lights as well. So, only the intended lights actually light (often not as bright as normal). One method to test this is with the trailer connected, multiple circuits on. Is to bounce on the hitch, to make the suspension move. If the lights get brighter, dimmer while doing that. That confirms that the hitch is not making a good electrical connection back through the hitch/ball. Proper trailer wiring includes a ground wire connection as part of the connector plug. Since you can not rely on a good electrical connection through the hitch ball and receiver. Another method is: Connect a battery jumper cable from a good clean place on the tralier/hitch to a good clean place (no paint) on the car. work the cables a bit to make sure they bite through any corrosion/dirt. If the lights work correctly. That confirms a bad ground in the wiring system. If it is a bad ground. You'll have to trace the problem to either the trailer wiring (often the ground connection is made near the hitch) or vehicle.
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