Gauges went crazy after dead battery - HELP!
Had my 2005 Motorhome E-450 V10 parked for about 2 months. Went to start it today and battery was dead. Battery is dated 6/14. Charged battery with 6amp charger for 4 hours. Started with no problem...
Forum Discussion
Sam Spade wrote:Baja Man wrote:
how did the ScanGaugeII kill the battery?
Just like any other accessory, it draws power when it is turned on ??
I learned the hard way that the OBD II port provides power at all times and the reader RS232 interface module I was using sucked down the battery over a few days. I had assumed incorrectly that if the ignition was off the OBD port would not be powered. That was on a 99 F53 chassis.
On Edit: Just to clarify. When the ignition was OFF the computer was dead (non communicating) but the OBD II port was still providing power from the chassis battery.
