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  1. #1

    Question Zero Power with a fully charged battery

    Hey guys, I hope someone can help with this.

    I have a 93 GMC ECSB. 5.7L 350. I went out to start my truck tonight to head to walmart and nothing happened. lol
    No lights, no ignition. So my first thought was I must have left the dome light on and drained the battery. So I pull the battery and set it up on my trickle charger. Nice slow 2amp trickle and I will deal with it in the morning.

    Well, I'm watching the needle on my charger slowly move over to 100% fully charged. I have a new battery, maybe 2 months old. Charger says it's good. So, whats my next step? Fuses? Alternator? Relay? Need help......
    93 GMC Sierra

  2. #2
    Legend

    Join Date
    Sep 2010
    Location
    everett, massachusetts
    Posts
    1,464

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    being this old corroded cables are a big item. the other is fuseable LINKS . these type wire fuses turn green [corrode] and you get no power . after you check the battery cables then go to the starter and check for these wires and links condition. you may also have a link or two over the intake manifold harness which is less likely to be corroded but some have had this issue with these at this location.

    using a volt meter track down the loss of voltage . check that the ignition switch is functioning properly.

  3. #3

    Default

    Thanks that will give me somewhere to start. Gonna go get some new cables right after I have a cup of coffee.

  4. #4

    Default

    Just make sure to replace them with new links, az, etc has them with the other wiring stuff. On the 80's gms there were 2-3 down by the started but im not sure on a 93. My buddy had one off the starter rot on his monte and there was no power inside at all.
    01' 1500 LT Z71 ECSB 5.3L
    line-x'd front brush guard with KC Daylighters, 6000k HID lows and highs, rewired highbeams, Trans-go mild shift kit, custom stainless duals, 3500 dually OEM taillights, K&N CAI. Still have OEM fender flairs and leveling kit in boxes waiting for time.


  5. #5
    Master Mechanic zigger215's Avatar
    Join Date
    Sep 2011
    Location
    Fairbanks, Alaska
    Posts
    551

    Default

    I second the cables and termination points as a possible cause, if you have very low output once the truck has started then it could be an alternator issue

    OR

    You're American made truck simply doesn't want to go to a s*** show that is wal mart.

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