2000 Chev Sliverado 1500 V8-325 5. Started out as the battery, or so we thought, we replaced it. Next morning same thing so we were told to replace the Alternator, Next morning;nothing, no lights, won't turn over, fuses okay, just has no electrical power at all. radio, ignition nothing works
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Re: will not start, everything dead
The correct soluation to any automotive problem is a correct diagnosis. In your case, this is exactly what is needed, not heresay or by guess or by golly. I am not being smart about this, it's just that I have spent 35 years as a professinal auto technitian and have seen this situation time and time again.
If you are not able to do the diagnosis your self, you need the help of someone who can do a hands on diagnosis for you.
1. Start at the battery. Do not replace as a meanings of repairing. Verify. If the battery has power, then begin to look at the cables, and then look at fuseable links. These are heavy wires coming off the battery that act as fuses. They burn on the inside of the wire, but many times one can not tell unless they they them with a 12 volt circuit tester.
When using a 12 volt circuit tester, follow the power trail. Start at the battery and determine where it is and where it is not.
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Check your convience and vanity type lighting to be sure they are shutting off( underhoodlight, glove box, back sun visor mirror lights, etc...). Next you can use a clamp on amp draw gun and follow the draw thru the harness to the problem. This tool is available at most auto parts stores. Also, just because a battery is new doesn"t mean it Good!
Sounds like something is drawing current out of the battery when shut down, the next step is to test for current going out, when shut down. DO NOT RUN the vehicle with the battery disconnected, or kill your charging system.
suspect items include the diodes in the alternator.
For a battery to go dead on you like that there must be something draining the battery while the vehicle is switched off. It could be something like a trunk light which is not switching off or a short across some circuit that does not show up on any light. The first and easiest test is to disconnect the battery negative cable whenever you park the vehicle overnight etc. and see if the battery still runs down.
As a more positive step and if this does not affect the alarm, disconnect the positive lead from the battery and wire a bulb like a tail light bulb, between the terminal and the removed lead. The bulb should light up. Make sure that everything on the vehicle is switched off, the bulb should still be lit. Remove and replace the fuses one by one until the bulb goes out. That is the circuit that is running your battery flat. Check all the components on that circuit until you get the light to stay out and your problem should be found.
If you are having to bang the battery cables that is where the problem is you have a bad connection either in your connections or you have bad terminals install new ones another thing is you may have to put anti freezing liquid into your gas tank to keep from gelling and you may want to park in a garage it helps a little.
disconnected the battery last nite, reconnected this morning, started right away.
I noticed a cell phone charger was plugged in, I am hoping this is the thing that was draining the battery, if not, will look further.
COULD BE A BAD FUEL PUMP EVEN THOUGH ITS NEW, TRY THE FUSES IN THE MAIN FUSE BOX UNDER THE HOOD, ALSO TRY DISCONNECTING THE BATTERY CABLES FOR ABOUT 5 MINS, LASTLY IT MAY BE THE ECM [computer on fire wall]
HOPE THIS HELPS SOMEWHAT