I have a 1990 Chevy Cheyenne 6.2 Deisel 1500. I have installed a new alternator, 2 new batteries and fuses as well as an ignition/ steering column. My problem is: once I get my truck running, I'll drive it for a while ut when I shut it off, (to get gas or run into a store) it will not restart without a jump. Do you have any idea what this could be, and how I would be able to fix it? will I be able to do it myself? thank you
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The car is having power drained somewhere. Check for an electrical short or some kind of "on" power source. Good Luck!!----------------------------------------------------------------------------------- ECU Chip Tunning Tools
CHECK ALTERNATOR FUSE + FUSE LINK TO MAIN BATTERY FEED WIRE.MAKE SURE YOUR BATTERY CABLES IN GOOD SHAPE.IF THEY ARE OLD REPLACE THEM.BECAUSE THEY WILL CAUSE HIGH RESISTANCE IN CIRCUIT CAUSE CHARGING PROBLEMS. AND CHECK ALTERNATOR POSITIVE WIRE AND VOLTAGE REGULATOR WIRE.MAKE SURE DRIVE BELT NO SLIPPING.ALSO MAKE SURE YOUR BATTERY IS 12.5 VOLTS.IF BATTERY IS WEAK ALTERNATOR WILL NOT BE ABLE TO CHARGE IT.IT WOULD BE LIKE A BUCKET WITH LARGE HOLE IN IT.KEEP FILLING IT WITH WATER IT WILL LEAK OUT.IT WONT HOLD NONE.
Check all your fuses if you had a system failure it could have blown a fuse. I am not sure on your vehicle where the fuse is in the car or under the hood it could also have a relay. You can check your alternator by checking the voltage at the back of the alternator where the big wire bolts on. You should have 14+ volts at the alternator.
Ok, first, you need a new altemator. When you pulled off the battery cable with the truck running . it caused a voltage spike and fried the voltage regulator, which is internal on this particular altenator. If you want to check to see if the altenator is charging, use a volt meter.
Since it wouldn't start after you put the new altenator on, it could be one of two things, either you got a bad altenator which happens sometimes or, you have a weak battery and the altenator is tryng to charge itself to death.
Have you had the battery tested? (a new battery can still have a bad cell)... also, check all leads from the alternator for tightness and correct terminal location. If that's all good, then it sounds like a short if it is slow draining the battery. Check that all items in the car are off and unplug any chargers you have from the cig lighter, also check that the glove box light is not staying on when shut.
Hi. You would need to put a volt or amp meter between the positive terminal of the battery and the battery itself. You have a very large draw on the battery after everything is shut off. Watch the meter and start unpluging fuses to see if the meter goes down. Make sure your doors are shut and the ignition has been off for at least 30 minutes so the computer will go to sleep. If the meter doesn't go down after pulling all the fuses then start loooking for a short possibly in the seats if you have electric seats and other things like that. It may take a lot of looking around but something is causing a very big current draw on the batteries.