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    aneye4solutions's Avatar
    aneye4solutions Posts: 3, Reputation: 1
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    #1

    Dec 26, 2012, 02:38 PM
    1999 chevy 4.3v6 silverado, cranks, no spark and no fuel
    1999 chevy 4.3v6 silverado, cranks, no spark and no fuel

    Truck shut off while driving.
    Had 2 misfire codes about a month ago
    Rec a p1051 code

    Replaced all spark/coil wires
    Replaced coil
    Replaced icm
    Replaced rotor and cap
    Replaced pcm

    Clear code and rec P0366

    Removed and cleaned up crankshaft sensor, reinstalled after new one didn't work either.

    Code removed.

    Installed new battery

    Cranks, no spark and fuel pressure.
    No power at prime port on underhood electrical box

    Swap out all realys there with known good one, no change.

    All fues there and on left side of dash OK, kindly advise on floor board fuse
    Panel there are 3 relays what are they for?

    Have power to devices and grounds OK.

    Any advice ?

    Truck down for 3 weeks now, hate to take to shop feel I can repair.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    Dec 26, 2012, 03:00 PM
    Did you use a test light or multimeter to test for power through all under dash fuses, when the ignition switch is turned to ON? If there is not power at the fuses, even though they are not blown, the ignition switch may be bad.
    aneye4solutions's Avatar
    aneye4solutions Posts: 3, Reputation: 1
    New Member
    		  
    #3

    Dec 27, 2012, 10:29 AM
    Check fuses under dash the following do not have power

    10 A illum

    10 A CRANK

    10A INT PRK

    REMOVED FUSES AND ALL HAVE OHM READINGS OF 0.3
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #4

    Dec 27, 2012, 10:39 AM
    Yes, the fuses are good but there's likely a problem with the ignition switch. Replace it and all of your problems may be solved.

    The basic flow is positive battery terminal to under hood fuse box to ignition switch to under dash fuse box to many other circuits.
    aneye4solutions's Avatar
    aneye4solutions Posts: 3, Reputation: 1
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    #5

    Dec 27, 2012, 11:06 AM
    Kindly advise steps need to be taken to remove switch.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #6

    Dec 27, 2012, 11:14 AM
    It will be some variation of this:

    1. Disconnect negative battery cable.

    2. Remove dashboard lower cover and knee bolster.

    3. Disconnect 5-P connector from under dash fuse box and 7-P connector from main wiring harness.

    4. Remove steering column covers.

    5. Insert key and turn it to "0".

    6. Remove two screws from switch and replace.

    Remember, you are dealing with the switch, not the lock.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #7

    Dec 27, 2012, 11:26 AM
    Verify on the fuses that didn't have power that they still don't have power, when the ignition switch is turned to Start. You may need a manual to tell you how to test them.
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