E450 CLASS C CHARGING ?

bobthegod wrote:
Google "12 volt battery tester" Get the one that goes into the 12 volt power port of the dashboard. Put in the port with the engine off.....it should read 12.75 volts or near that. Start the engine and it should go from 13-14 volts. Means it's charging the engine battery. Shut off the engine and put in a power port in the motorhome area. It should read 12.75 volts, again start the engine and it should jump up to same reading as the front 13-14 volts. Means it is charging the house batteries. Do you have a generator? if so shut off the engine, start the generator and see if the meter jumps again to 13-14 volts and the generator is also charging the batteries also. Good luck

X100 .... an outstanding piece of advice!

Going a little further and for what it's worth: I have two voltmeters on the dash of our Itasca Class C motorhome - one plugged into the stock Ford 12V dash receptacle and another Velcro'd onto the dash with it's input plugged into a 12V receptacle back in the coach.

One voltmeter shows the approximate voltage of the engine battery all the time. The other shows the approximate voltage of the coach batteries all the time.

Both meters read over 14 volts when driving down the road .... meaning that the alternator is charging both sets of batteries. When parked with the engine OFF both meters show the approximate voltage of the two battery sets, which of course differs for each battery set .... with the two voltmeters reading in the 12 volt to 12.8 volt range if everything is normal and working as it should.