any ideas? i have a 1991 e350 7.3 non turbo that all of a sudden sitting over night will drain the batteries. checked everything i know of. any help would be appreciated.
did u check for draw and if so how many amps is it drawing? with th volt meter hooked up start pulling fuses until the draw goes away then u will no what circuit is creating the draw
Bad headlight switch?, the rheostat spring/coil for dash lights coming out of position and shorting to the dome light contact,have replaced several of them over the years.