Truck will not start

If jumped it turns on then turns back off when disconnected

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Have you checked that the alternator is working?


Check the battery, check all connections, and check the alternator. If the battery is completely flat the alternator could be damaged by overdrawing on it as it tries to revive a dead battery. Battery life can be affected by many things but if it's over 3-4 years old definitely get it checked.

Try charging the battery; if it won't hold a charge replace it. If it does hold a charge (or you replace it with a fully charged battery) the truck should run; if it does run, make sure to also get the alternator checked. A lot of the Auto parts supply stores will check the function of both the alternator and battery for free.


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