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1997 - 2003 Ford F150 General discussion on the Ford 1997 - 2003 F150 truck.

ignition switch short?

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Old Jul 15, 2016 | 09:26 AM
  #1  
dragoon65's Avatar
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From: central texas
Default ignition switch short?

good morning gentlemen.

Vehicle:
2000 ford F150 lariat
triton V8

3 times in the last month and a half, i have gotten into the truck and had no power. I get out, wipe off any corrosion on the NEG terminal, muscle it to move just a skoash (I'ts very tight), get back in the truck and i have power and it starts but the gauges all peg to max for just a second during crank and start. no problems after that.

This morning, I get in to go to work. I have power. When I insert the key I get the bell. When I turn the key, the dome light goes out, the bell stops and I get one or two of the idiot lights very dimly lit. Turn the key off, everything goes back to normal power. Did this 4 times and putting key in, taking it out, etc.

Finally, I tried turning the key extra slow and it turned right over. Normal operation after that.

#1 I suspected that I was getting an issue with the ignition switch but I need to understand why in the beginning, messing with the battery terminal, I was able to restore the power. Or do I have two separate problems here?

#2 will the internal components in the switch cause the short I experienced this morning or might it be something in the column beyond the switch?
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Old Jul 15, 2016 | 05:55 PM
  #2  
dragoon65's Avatar
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From: central texas
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Question,

Is it the ignition switch connector (part# WPT-577)that makes mechanical contact when you turn the key?
If I don;t replace the lock tumbler assembly then I don't have to get the key programed?
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Old Jul 16, 2016 | 07:44 PM
  #3  
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98 F150 5.4L E40D/4R100
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You need to go though all your grounds and cable connections first. That has to be done and done thoroughly. Yea there comes a point when this needs to be done, can't get away from it. Otherwise, the truck will become possessed with a mind of it's own and they do some very strange things. None of those are good for it. Plus you'll be losing your hair at an exponential rate.
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Old Jul 24, 2016 | 09:31 AM
  #4  
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it was the cables...
old battery connectors that were corroded more seriously than I realized.
Had to trim the ground wire to the terminal because of corrosion that had infiltrated under the sheath about an inch and a half.
Both terminal connectors had to be replaced.
Everything works as it should now.
even seems to idle a little smoother.
Thanks for the reply JBREW i do appreciate it.
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Old Jul 24, 2016 | 02:09 PM
  #5  
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98 F150 5.4L E40D/4R100
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From: MI
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No problem. Yea those cables can get pretty tricky as well. I had a pin hole in the insulation once that caused the cable to corrode on the inside. Couldn't see it, - found it eventually.

Glad you found the problem.
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