Originally Posted by ALJO
Some of the Power Jacks rely on the chassis ground which can be a poor connection at times through rust forming. I have always installed the extra ground wire directly to the motor. That one wire (red or black) from the power Jack has to go to the Batt.+. That they used the fuse link to protect the Power Jack isn't a bad idea. Some Power Jacks has a circuit breaker installed in the unit itself.
As ALJO said...
If your Power Jack has an inline fuse as part of the wire coming off the jack connect it directly to the Positive battery post, if it does not have an inline fuse as part of the wire from the jack, connect it on the TT side of the main trailer fuse/breaker.
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