View Full Version : Dead batteries?

02-25-2007, 08:08 PM
Ok ford guy's I have a crewcab superduty with a 7.3L powerstroke. Batteries have been going dead if left a couple days, charged and load tested batt ok, alt putting out fine. only thing I found was when you unhook smalled cable off left batt there is a small spark and the door lock motors make noise like they are working. Just had a alarm installed, but it happened once before they did so might not be caused by them. I had thought my brake controler was causing the problem but I took that out. Any Idea's or Know problems?

thanks.:confused0006: :confused0006:

02-25-2007, 10:17 PM
HA man discnect the grond cabel and put a test light in btween the bat nagativ and the cabel and start puling fuse entel the light go out then read the fuse panil and then it will tell you whot the fuse is for then put the fuse back in then discnect everthing that the fuse is for entell the light go out then when the light go out then that is your problem

sorre abut the spelling i was not got at school

In The Zone
02-26-2007, 10:16 AM
you have a good drain somewhere if both batts are being drained...

i would start with the alarm wiring if it is a new problem since the install.