ECM won’t boot, can’t turn in headlights until I check battery volts with multimeter?
Hi all, I have a weird one.
The common circumstances leading up to this issue: laptop running with ungrounded ac adapter plugged into my house inverter, USB nexiq plugged into bus data port and laptop.
The issue: turn the key to ON, dash lights up for maybe a second then goes dark. Transmission touch pad stays on. Obviously can’t start the engine. If turn on the parking lights I hear relays buzzing, turning on headlights kills the shift pad too.
The only fix I’ve found both times this happened: use my analog multimeter to check the battery voltage at the battery box. It usually says 12v. After that I can crank and start no problem.
In the process I checked the main battery ground, unplugged the laptop ac adapter and nexiq, a variety of other things to no avail.
So what the heck is going on? Do I have bad batteries? They’re about a year and a half old.
|