Just a thought, maybe the engine vibration is causing a short to ground, where at key on, it doesn't ground. You could use a testlite in place of fuse, engine running, unplug hvac components one at a time, see if you can get the lite to go out. Maybe the testlite will control the load enough not to burn anything? Wiring connector or wiring itself?
Sunday, January 16th, 2011 AT 5:04 PM