RobW0
GOLD Star
Wow that is not good. I have the Redarc BCDC 1225 in mine. The BCDC will isolate the Aux battery from the start battery when the start battery is below 12.6 or 12.7 volts I think. I also installed one of their SBI12 battery isolators so I can link the them with a momentary switch in the cab to allow me to jump start from the Aux battery.Whatever they did...(not entirely sure)...it was sitting there trying to run AC and any other stuff it does when the engine is running...BUT without the engine actually running.
Both batts automatically link when the engine is running. So if they put it in an ON state...but no engine running the alternator......they both drain.
My wife did the same thing yesterday as the tech did to you. She left the car in drive and turned it off then went into work. Came out and the car would not start. I had to go and give here jump start. I asked her, wasn't the car beeping at you when you got out and locked it? She said it was but just ignored it because she did not know why it was doing it.
