Truck Battery discharging overnight
Hoping you guys can help me. Ive got a 2013 class c Coachman on a Ford E450 super duty chassis. The truck battery, alternator, volt reg have been checked professionally several times this last wee...
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mharrel wrote:
e.nblethen :
thanks for the help.
yes, it's the chasis (truck) battery not the house battery.
no, no electric stairs
is the carbon dioxide monitor able to disconnect from power to check to see if that is problem?
would the "charge relay" be in the fuse box. it looked like there were a bunch of relays in there.
thanks for your ideas.
Carbon monoxide/LP gas monitor should be only connected to the "house" battery, not the chassis battery.
If you are talking "charge relay" as the relay to charge your house batteries while driving, that relay would be mounted in the engine compartment not under the dash.
As far as engine charging goes, no relays involved, alternator is directly connected to the batteries as pretty much a industry standard. The diodes in the alternator prevent the alternator from draining the vehicle battery when engine is off.
What you are looking for is items which may have power all the time regardless of engine on or engine off.
in 2013, very few items are directly turned on/off via the keyswitch. Instead many items use Fords "CAN Bus" which is Fords version of a data network.
Good example of this is the factory stereo in that yr, the main connector to the radio does not have any ignition "switched" 12V power. Instead, the radio is turned on/off through the CAN bus data network, the radio gets data from the CAN Bus that tells it to power up or turn off.
The downside to this setup is all it takes is one broken or shorted wire anywhere on the CAN bus network to create a failure of the entire network which may cause modules using the CAN bus to not turn on or off when they are supposed to.
It is that reason why I mentioned the harness connectors at the rear of your vehicle, water intrusion damage is very real on 2011 and up Ford vehicles. One wouldn't think a little water in a connector that far away could cause things to not work correctly, but it does.
It is also the reason I mentioned checking the connector which is attached to the parking brake assy.. The pins break from the wire in that harness connector causing lots of electrical gremlins.
