Does 12-V Accessory on Motorhomes 7-Way Stay Powered Up With Ignition Off

Question:

As this only has a circuit breaker, it seems the 12Vpin on the toad would always be hot. Is that the way its supposed to be. When we stop for the night, while traveling, do I need to disconnect the 7 to 6 pin wire to keep the batteries on the toad an MH from being connected?

asked by: Bob C

Expert Reply:

The answer to your question is 'maybe'. It'll depend on if your 12-V feed to your trailer connector comes directly through the battery or through an ignition keyed source. You can pretty easily determine this using a circuit tester like # PTW2993. Just check the 7-way pin in the 1:00 position with the motorhome ignition off. If it shows power, it's directly wired to the battery. If not, you'll be fine.

If you DO find that the 12-V pin stays powered up with the motorhome shut off, you can either unplug the toad overnight, or you can install a solenoid like # PK5231201 inline on that 7-way feed circuit. The solenoid will power down the circuit when the motorhome ignition is shut off.

expert reply by: Mike L