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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

    Join Date
    Sep 2010
    everett, massachusetts


    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


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

  4. #4


    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
    Fairbanks, Alaska


    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


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

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