Originally Posted by flyboytravel
The chassis batteries are not being charged while on shore power. I'm thinking it's the coil. I'm getting DC power from three of the four posts on the coil. Could the post with no power be the one going to the chassis batteries? The coach batteries are being charged while on shore power. Thanks for your help.
Are you sure that it is supposed to charge the chassis batteries while on shore power?
My Holiday Rambler is equipped with an Isolator Relay Delay, and it only charges the house batteries when on shore power.
Some motorhomes have a bi-directional isolator relay delay, and it will charge both sets of batteries when on shore power.
Of course, you could have some other type of device than what I've referenced.