How to Wire 7-Way to Have 12V Trailer Power at All Times
Question:
The 40 amp fuse is good,and power to the fuse,what to check next,what makes it charge only when the truck is running
asked by: Joe B
Expert Reply:
Most vehicles equipped with a factory-installed 7-way will have the 12V trailer power circuit switched by the ignition key. Otherwise you could run the risk of the trailer draining the vehicle battery.
It is possible to wire a 7-way so that the 12V trailer auxiliary power circuit, usually carried on the pin at 1-o-clock (see photo please) remains active even when the truck is off. You would simply need to run a 10-gauge wire from the battery + terminal, through a 40-amp breaker like # PK54540, and on to the 7-way where it would need to attach to the appropriate pin.
Products Referenced in This Question
Pollak Circuit Breaker - Cycling/Automatic Reset - 40 Amp - Straight Mount Bracket
- Accessories and Parts
- Wiring
- Circuit Breaker
- 40 Amp
- Pollak
more information >
Product Page this Question was Asked From
7- and 4-Pole Trailer Connector Socket w/ Mounting Bracket - Vehicle End
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- No Converter
- Custom Fit
- 7 Round - Blade
- 4 Flat
- Hopkins
more information >
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