Quote:
Originally Posted by Byron Kinnaman
2005 Dakota with factory tow package.
direct from the battery to fuse block, through a 30amp fuse to 7 pin connector. 10 awg wire teflon (cross link) insulation.
No diode, or other items. When the trailer is plugged in both the truck battery and trailer battery are connected together.
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Exact same setup here. Except I'm using a relay as an isolator, which is controlled by the ignition key.
Relay is closed when the key is an ON.
Relay is open when key is at START or OFF.
It's a continuous-duty relay,
sold specifically for this.
On the trailer side, from the 7-pin connector I'm running 6 awg wires direct to the trailer battery (fused at the positive also).
I'm using 6 awg since I was able to get some for cheap, otherwise 8 awg would have worked good ok.