2002 Ford F-150 Drawing power from battery

2002 FORD F-150
124,988 MILES • 4.6L • V8 • 4WD • AUTOMATIC
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LILYMARIE71
  • MEMBER
  • 2 POSTS
Fuse 103 is drawing current from battery. .2 amp! When I take the 50 amp fuse out it no longer draws current out of battery. Thinking it maybe my security system but my lights in the dash are flashing which is a good indicator that my security is fine. Why then would my security system draw so much energy?
Oct 27, 2014 at 2:03 AM
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JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
I can help you get started, that 50 amp fuse supplies voltage to the fuses in the diagram. Pull/replace fuses one at a time, when you pull fuse on problem circuit, the drain returns to normal. Then you check everything on that fuse circuit.

It is possible this will be like hunting a needle in a hay stack? I hope not. The drain with everything off shouldn't be more than 50 ma, .050 amp.
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Oct 27, 2014 at 3:19 AM
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LILYMARIE71
  • MEMBER
  • 2 POSTS
When the 50 amp fuse was removed the engine check light came on. I then put engine on code reader a P1633 keep alive power voltage too low was displayed! Can you pin point the problem there? Thanks
Oct 27, 2014 at 5:14 AM
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JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
In my opinion that code isn't valid because the 50 amp fuse was unplugged. Check for amp draw, by remove/replace the fuses in the diagram I posted. I can help with testing but you have to do the testing.
Oct 27, 2014 at 7:52 AM
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