So I've got a 2012 Nissan Frontier that came with all the 12 volt power ports being switched so they're only hot when the key is on. I wanted one that was hot all the time so I picked up an OEM power port a and trim ring to put in the unused dash opening where the aux input would be if it had come with one. That was in early 2014. The circuit was run from my Blue Sea Aux fuse block and worked fine until recently. Started getting intermittent outages in the last year and finally it quit working at all a few weeks back. I checked the wiring and connections at both ends of the circuit and all seemed good so I ordered another power port from Nissan in case the first one had somehow failed.
Here's where I get lost. While I don't claim to be an expert on auto wiring, this is a really simple circuit. Power and ground on the Blue Sea are good and the other circuits on it (aux lighting) work fine. The fuse to the power port circuit is not blown, and I've tried swapping fuses just to eliminate that variable. When I check voltage at the power port with my meter I show that port having basically the same voltage as the switched power port below it when that one is hot. Nothing I plug into the added port (GPS, phone charger, etc) gets power but they all work in the switched port below when it is hot. I'm obviously missing something in my diagnoses, and probably something simple, but I need help figuring it out. Could the ground wire have lost continuity? The hot wire is obviously getting power to the first half of the circuit. I admit defeat and am willing to use it as a learning experience if someone has an idea what's going on. Thanks.
Here's where I get lost. While I don't claim to be an expert on auto wiring, this is a really simple circuit. Power and ground on the Blue Sea are good and the other circuits on it (aux lighting) work fine. The fuse to the power port circuit is not blown, and I've tried swapping fuses just to eliminate that variable. When I check voltage at the power port with my meter I show that port having basically the same voltage as the switched power port below it when that one is hot. Nothing I plug into the added port (GPS, phone charger, etc) gets power but they all work in the switched port below when it is hot. I'm obviously missing something in my diagnoses, and probably something simple, but I need help figuring it out. Could the ground wire have lost continuity? The hot wire is obviously getting power to the first half of the circuit. I admit defeat and am willing to use it as a learning experience if someone has an idea what's going on. Thanks.