Battery is two weeks old. It was just replaced (under warranty) and the last battery was like 9 months old. I can't seem to get this truck to hold voltage, and this might be related to my overall electrical issues. I don't drive it daily and it may sit for weeks at a time. When I drive it, park it, check voltage, it shows 12.7-ish volts. A week later it will show 12.5 or so. Another week and it will be at 12.2. I was hoping the new battery would fix that. So far parasitic draw tests (#1 pulling fuses with a multimeter in-line with the negative cable = 13mA draw well within spec; #2 current draw test across all fuses) are not showing anything wrong.
The airbag light is unrelated to my issues - I just replaced the BCM and even in the paperwork I received it gave instructions that this was normal and required a reset by a scan tool (one of the reasons I bought the tech2) and I was successful in doing this.
I was able to command the vent valve finally after charging the battery up overnight.
I followed directions posted a long time ago from
@swathdiver - at the plug to the vent valve itself, I have +12v on one wire with Key on, and NO ground on the other, whether commanded by PCM or not. According to those instructions:
So there's no short to ground, there's no voltage, so I need to trace where it goes and test whether it's open or has high resistance.
I have Bose speakers, I assumed that meant I have the Bose amp as well?
I am doing this now as it seems to be resolving most of the communication issues, but I'm not sure why my 2nd new battery in a year keeps dropping down.
I will take a look at this tonight.
