Adding loads to the "ignition run" or IGN1 line can be a problem because there might already be damage. the big big causes are the big red and big black ammeter wires through the bulkhead connector, possibly the ammeter, certainly the ignition switch, and the bulkhead feed through for the ignition "run" wire
More loads cause more drop. One way around this is add a relay operated by the key to feed the underhood loads. Keep in mind that line is NOT fused
I recently replaced my bulkhead connector (last month) and inspected everything.. I actually need a few 12 AWG female connectors to replace .. I temporary installed 18 AWG female connectors because it's all my local parts store had.
Thanks
