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one of three possible things.

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Old 06-19-2009, 01:43 AM   #1
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Thumbs down one of three possible things.

This is weird. I think I have narrowed it down to one or all of three things. Ignition Switch (most likely candidate), loose ground wire, faulty computer!
When I go to turn the truck on in the second position the electronics turn on but the dash lights do as well!
Then if you have the ignition key out, and turn the lights on the electronics turn on and so does the lights and dash lights.
I replaced the headlight switch, dimmer switch, fuses, all recently.
What do you guys think? Truck starts fine. Runs fine.
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Old 06-19-2009, 03:33 AM   #2
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should be able to rule out the computer on this one computer should have nothing to do with it.

But like you said ground, or switch, or maybe 2 positive wires touching?
or melted to each other?
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Old 06-19-2009, 03:51 AM   #3
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+1 about computer. Loose ground can be easily checked - run a temp wire from battery (-) to some metal part in the cab, for example parking brake mount bracket and see if anything will change. I suppose it's the ignition switch or it's wiring hairness.
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Old 06-19-2009, 01:22 PM   #4
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im going to go get a new ignition switch today or tomorrow, and ill try the ground thing as well.

By the way, where does the ground for the battery go? And for the solenoid on the fender?
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Old 06-19-2009, 01:31 PM   #5
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Could be a loose/corroded ground. What could be happening is that the power for some electrical item isn't properly grounded and is actually seeking the ground thru the dash light circuit thus the lights coming on
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Old 06-20-2009, 10:42 PM   #6
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it also could be the pos. wire from the battery to the starter solenoid, mine did the same thing and that was the problem
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Old 06-21-2009, 02:01 AM   #7
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Quote:
Originally Posted by 89f150drvr View Post
it also could be the pos. wire from the battery to the starter solenoid, mine did the same thing and that was the problem
the one that is on the fender?
UPDATE: I went to go to autozone but they didnt have the ignition switch, and it was toooooooooo blazin (100F on the mercury, felt like 110F) hot to do anything, then I had to go to work! So, ill try to get to it soon and get back to you guys!
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Old 06-21-2009, 12:52 PM   #8
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Quote:
Originally Posted by Boogerburns View Post
the one that is on the fender?
yea thats the one
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