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Electrical problem

   
Old Jul 26, 2017 | 01:20 PM
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Electrical problem
I have an electrical problem on a '99 F550 7.3L service truck. The electrical system is drawing about 400 mA with key off and doors closed. It's a dual battery system, but still manages to kill the battery overnight. Isolated problem to the #15 fuse under the dash, a 5A fuse that according to the OM, protects the GEM, PCM and ABS modules. Any ideas where I go from here?
 
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Old Jul 26, 2017 | 06:10 PM
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Did you wait the requisite 35-40 minutes for the battery saver circuit to time out before making your measurement? If not, your test results are invalid.
 
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