Forum Discussion

PatrickFisherPr's avatar
PatrickFisherPr
Explorer
Dec 19, 2015

Drawing more than 12 volts off auxiliary battery

I have a 1984 Toyota Sunrader. Under the hood is an auxiliary battery, which charges off the alternator. The auxiliary battery operates my water pump and the furnace. The furnace requires approx...
Seeking Advice
prichardson's avatar
prichardson
Explorer
Dec 20, 2015
Were you measuring the voltage at the battery or the furnace? Check the voltage at the furnace both with and without it calling for heat. If there is a big difference, I suspect that you are getting a voltage drop due to poor wiring connections somewhere.

About RV Tips & Tricks

Looking for advice before your next adventure? Look no further.25,129 PostsLatest Activity: Apr 26, 2025