Question about 1998 GMC Suburban

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1999 F250 7.3 Diesel will not start

I have had both batteries checked and they both are reading 12.45 volts, the starter was benched checked at Autozone and the bendex comes out and spins and I've had a relay on the fender well checked and it too was good. When I try to start the truck all I hear is a clicking noise. That's it! No trying to turn over or anything. Could it be the starter or a bad ignition switch? Please help!

Bob Bailey

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  • beetlebob Sep 10, 2009

    how do i find the reserve amperage and what's a drop tester?

  • beetlebob Sep 10, 2009

    how do i find the reserve amperage and what's a drop tester?

  • beetlebob Sep 10, 2009

    The amperage in both batteries were around 560 CCA. So, I replaced both batteries and it is still doing the same thing. I'm just getting a clicking noise. That's it. Any idea on what might be my problem?

  • beetlebob Sep 11, 2009

    Well I've replaced both batteries with brand new ones, the battery terminals are good as well and as far as I can see, the cable on the engine is good. I will look at the relay today. I think my book showed one for the starter. For the faulty solenoid, are you talking about the one on the starter? Fender well? or the Glow Plug Solenoid? The one on the Fender Well checked good, I just replaced the Glow Plug Solenoid because it broke on me putting it back in. If they bench check the starter and the bendix pops out and spins, wouldnt that solenoid on the starter be good?

  • beetlebob Sep 11, 2009

    I took a jumper wire earlier today and tried to start the truck from the starter relay on the fender well with the key on. I got the same clicking noise and it sounds like that clicking noise might be coming from my starter. Is there a way I can do the same to my starter and see if it is the problem? I know it checked good at the part store, but does that really check the solenoid on the starter when you take it in to get checked on the bench?

  • beetlebob Sep 11, 2009

    It was the starter. It was bad which is weird because I had it checked a few days back and it was fine, but when I took it in today and they put a torque against it, it didn't do anything. I replaced the battery and she's running just like she use to. Thank you for the help.

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Whats the reserve amperage ???check batterys with a drop tester first before you spend any hard earned cash

Posted on Sep 10, 2009

Testimonial: "What is a drop tester? How do i find the reserve amperage?"

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  • Colin Stickland
    Colin Stickland Sep 10, 2009

    a drop tester is a thing for testing batteries ,it has a big resistor ,a spike and a very heavy cable .when put across the battery it glows red hot and reads the amperage being drawn ,if battery isnt holding a charge then this will show it up .Just because your volt meter shows 12v doesnt mean to say that batterys are any good whem you have a cell down .Had this before with a guy with a winibago ,i fitted two ne batterys and it was fine but got slated off to his mates that i was a cowboy because his voltmeter showed 12v ,and to start he kicked in the aux batteries .Stupid bar room mechanics

  • Colin Stickland
    Colin Stickland Sep 11, 2009

    still clicking?? so iam going to get talked about again but who cares .Right still clicking on starter motor ---causes

    1 battery

    2 earth cable from engine to battery

    3 dirty corroded battery terminals

    4 faulty solonoid

    5 dirty contacts on back of ignition switch

    6 faulty relay contacts

    plus most likely something else that i havent thought of ,still nobodys perfect ,but i would try puting a jumper lead from the starter motor fixing bolt back to battery ,a proper jumper lead and not one of these cheapo chinese boost cable type.try it and get back to me if it still plays up

  • Colin Stickland
    Colin Stickland Sep 11, 2009

    try the earth cable on the starter direct ,although cable looks good it could have a high resistance on one of the connections.also run a cable from the battery direct to the small connection on starter solonoid and see it that makes it start ,if with the extra earth lead on and a direct feed to the starter motor solonoid it should go if the motor is ok ,What about positive feed to big terminal ,try flashing it with an old jumper lead to make sure that you have a nice juicy flash .if all that fails change the starter ,or your engine is siezed solid ????best of british with it anyway ---from spain ,

  • Colin Stickland
    Colin Stickland Sep 11, 2009

    never mind the bumper whatsit ,try what i said that way you will know if the starter is producing enough torque to turn engine over ,and to locate the fault

  • Colin Stickland
    Colin Stickland Sep 12, 2009

    good glad you got it sorted

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  • 16 Answers

Did you try taking the gear hand out of park and into drive and then pushing it hard into park and then trying to start it? Also change the agnition switch!

Posted on Nov 23, 2009

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