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Old 03-03-2011, 04:55 PM   eBay Motors  #1 (permalink)
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Truck Won't Start. Keeps Blowing Ignition A Fuse

So here's the problem today i went out to my truck turned the key over and boom I blew the Ignition A Fuse. I have checked the ICM wires and Trailer brake wires and nothing is broken or chaffed. I have seen that many people have had problems with the ignition switch do you guys think this could be the problem.

Also have a P0562 DTC on.

Any info would help
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Old 03-03-2011, 05:21 PM   eBay Motors  #2 (permalink)
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That code is for low voltage-- something on that circuit is shorted to ground.

You will have to check a wire diagram-- for what that services --and it should help you trace the short.

Here is a trick that will help find it-- get a 10 amp circuit breaker (do not use anything higher than the 10 amp breaker-would burn stuff up) - use jumpers to add that to the system instead of the fuse. Now when it is shorted, the circuit breaker will click off and on. Use a el-cheap compass, now follow the wire with the compass. When there is power in the wire, the North needle will point to the wire. When breaker clicks off, it will point away from the wire. It will lead you right to the short. If the short is in the middle of the wire, it will point to the wire as you follow along, but if you pass it, it will not. Constant shorts are easier to find than ones that only shorts once in a while.

(With a short, it will build a magnet field around the wire. Electro-magnet)
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Old 03-03-2011, 05:24 PM   eBay Motors  #3 (permalink)
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You can also disconnect things one at time to help find it. It is a 5 speed trans, and many have had truble with the NSBU switch, disconnect that first.
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Old 03-03-2011, 05:25 PM   eBay Motors  #4 (permalink)
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it will not drive normally when the code is thrown. It goes in limp mode.

Could that be the NSBU
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Old 03-03-2011, 05:31 PM   eBay Motors  #5 (permalink)
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Lots of things will throw a code-and the vehicle will go into limp, - but the 562 code is a low voltage code. If you have a short- before it blows the fuse, the voltage is pulled down because of the short.
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Old 03-03-2011, 06:03 PM   eBay Motors  #6 (permalink)
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It's the starter..
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Old 03-04-2011, 12:19 PM   eBay Motors  #7 (permalink)
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Did you figure out the problem?
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Old 03-05-2011, 11:27 AM   eBay Motors  #8 (permalink)
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Changed the starter, made no difference. I'm going for the ignition switch now. How do I disassemble the column?
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4" Banks Cat Back
afe Intake

The Toy-
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37" Boggers
4.7L Stroker
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Old 03-05-2011, 06:34 PM   eBay Motors  #9 (permalink)
 
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Do you still need those instructions?
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Old 03-05-2011, 07:53 PM   eBay Motors  #10 (permalink)
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Quote:
Originally Posted by Jeff04 View Post
Changed the starter, made no difference. I'm going for the ignition switch now. How do I disassemble the column?
Ignition switch--
Remove the lower dash panel,
remove the housing under the shift column.
You will see the switch and wires- press a couple tabs and the switch slides out. You will have to make sure the switch is indexed into the key gears, or you will not be able to turn the key all the way.
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