Electrical short test
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Cross-Country
Joined: Dec 2011
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Electrical short test
I own a 86 f250 with 6.9, truck runs great. If I let set for 2 weeks, the 2 batteries will be so dead that the needle on the fuel gage wont move. I have a multi meter, how do I check for a short?
thanks nick c
thanks nick c
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
If your multi meter does Amps, Set it up for the highest amps, then disconnect your positive battery cable, connect the red lead of your meter to the positive battery post, connect the black lead of your meter to the positive battery cable!
BE CAREFUL ensure nothing shorts out!
If you have a draw the meter will show ...
Start with your meter set on the highest amp settings and work down!
DO NOT try starting the motor or turn anything on that will out amp your meter, you will burn the fuse in your meter!
Now start pulling fuses checking the meter after each fuse ... If that doesn't find it, start unhooking electrical items one at a time watching the meter!
A good place to start unplugging is the Sound System if one has been installed!
DO NOT forget to change your meter back before any other use!
EDIT
Remember, it could be bad batteries losing their charge!
Have them load tested.
EDIT2
See red ...
-Enjoy
fh : )_~
BE CAREFUL ensure nothing shorts out!
If you have a draw the meter will show ...
Start with your meter set on the highest amp settings and work down!
DO NOT try starting the motor or turn anything on that will out amp your meter, you will burn the fuse in your meter!
Now start pulling fuses checking the meter after each fuse ... If that doesn't find it, start unhooking electrical items one at a time watching the meter!
A good place to start unplugging is the Sound System if one has been installed!
DO NOT forget to change your meter back before any other use!
EDIT
Remember, it could be bad batteries losing their charge!
Have them load tested.
EDIT2
See red ...
-Enjoy
fh : )_~
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whitey33
1987 - 1996 F150 & Larger F-Series Trucks
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Dec 31, 2016 08:25 PM
