Carrier Ultra XL problems, need help!!

[DaButcher]

You are right the gauge will not cause the battery to discharge. If the connection on the back of the amp gauge is loose it will cause problems however.

You need a inductive amp probe to help determine what is killing the battery. I would hook up the amp probe and start pulling fuses and relays until the amp draw stops.

Relays are abbreviated for what they control. Example: GPR is glow plug relay.

It is also possible that the battery is not getting charged correctly from the alternator.

[abbsnowman]

Just to be clear here, is the battery dischraging when unit is off or on? Do you have a DC ameter? I'm interested to see were this goes. Don't give up on us yet!
To drain battery or request 40 amps, its a short to ground somewere.
Keep posting

[Diesel Dummy]

Just to be clear here, is the battery dischraging when unit is off or on? Do you have a DC ameter? I'm interested to see were this goes. Don't give up on us yet!
To drain battery or request 40 amps, its a short to ground somewere.
Keep posting

Yes it is discharging when off, ill try pulling relays in am when i get unloaded and get home, Alt. was replaced with a factory carrier unit, display says it is working fine shows between 13.4-13.8 at any given time. I got my wiring diagram to tell me where everything goes and what it is so ill guess ill try that.