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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Truck dead- ignition switch?

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Old Jun 24, 2010 | 03:22 PM
  #1  
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From: Des Moines
Truck dead- ignition switch?

1991 F150 5.8

Acts like it's a dead battery, but when I jiggled the tumbler I got the dome light to come on and the alert tone started going off. But then as soon as I tried to start it, acts like the battery is completely dead- won't even click. Tried jumping it and didn't get so much as a crank, so I'm guessing ignition switch or something related to it.

Suggestions?

Thanks.
 
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Old Jun 24, 2010 | 03:34 PM
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Check the battery cables!!! All of them, both ends!!!!!!

99.9% chance you will find your problem....
 
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Old Jun 24, 2010 | 04:40 PM
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From: Des Moines
Well I replaced the positive cable about 2 weeks ago, so perhaps it's time I give the negative cable a look...
 
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Old Jun 24, 2010 | 05:01 PM
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check the starter mine did the samething
 
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Old Jun 24, 2010 | 05:36 PM
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From: Des Moines
Originally Posted by topdogcustoms
check the starter mine did the samething
Starter is brand new. Replaced it about the same time I replaced the bat. cable 'cause I thought that was the problem at the time.

That's not to say a brand new starter can't be bad, but I'll look at the negative bat. cable first.
 
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Old Jun 24, 2010 | 07:14 PM
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Well a bad starter is not going to kill all power to the truck....Think about this for a minute!!!!!! So check the cables very close, try putting jumper cable from neg post on battery to the engine block, that should bypass the neg cable at least enough to prove if it is at fault... And recheck the pos. cable you replaced recently, could it be loose somewhere?
 
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Old Jun 24, 2010 | 07:31 PM
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From: Des Moines
Originally Posted by White 97 xlt
Check the battery cables!!! All of them, both ends!!!!!!

99.9% chance you will find your problem....
+1 to your rep for the correct answer. I cut some insulation off the negative cable and found the fibers to be very dark- a good indicator that the cable is bad. Quick run to the parts store for a new cable and a half hour later, all is well. I guess I should have checked the negative cable when I replaced the positive.

Thanks again for the help.
 
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