1999 Ford F-250 Electrical Problems

1999 FORD F-250
160,000 MILES • 5.7L • V8 • 4WD • AUTOMATIC
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JOJODO
  • MEMBER
  • 1 POST
Battery going dead and the heater and ac fan will run unless the heat switch is off even if the ignition switch is off and key is out of it. The ignition switch does not have any play in it.
Nov 28, 2014 at 7:17 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
check you blower relay I t may be hanging up or bad. you can either switch with a like relay or go to our site under how to repair electrical an dhow to check a relay
Nov 28, 2014 at 7:54 AM
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BLACKOP555
  • ✓Experienced Mechanic
  • 10,386 POSTS
More often than not you have water leaking in the fuse box and gem module under dash on driver side. Look at back side of it on seam. If its Grey or green coming out of it even water you need new fuse box gem and get your wind shield resealed
Dec 3, 2014 at 11:45 AM
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