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2003 buick rendezvous turns over but doesnt start,battery dead and when i turn key instrument panel light go off then while cranking they flash on real bright then go off
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GM doesn't use an inertia switch, that I'm aware of. I don't know what testing you have done? Engine cranking, do you have spark at the plugs and fuel injector pulse? Any applicable trouble codes? If through your testing you have narrowed it down to fuel system, note the diagram.
Is the security light lit on the instrument cluster ? If not , not a security problem . Have you taken an had diagnostic done ? That's your best course of action . These systems are complex !
Not sure if you mean engine is locking or vehicle will not crank. If the vehicle doesnt crank and the security light is flashing, the problem is most likely a worn out key and lock and tumbler assembly. Once replaced the new key will have to be recognized by the body control module through a reset procedure. Close drivers door. Turn ignition to run position and wait for security light to go out. Turn key off for 2 seconds. Do this 3 times in row. After turning key off 3rd time the key code should be recognized by the body control module and the vehicle should start. Hope this helps.
turn your key to the on position and look at the instrument panel, if you see an icon for antilock brakes, you probably have them.another way to tell is if there is wires with an electrical connector at each wheel.you might have to remove the wheels to see them.
Start by checking the fuses and then the battery connections, this sounds like a fuse poped maybe a main fuse, if its a fuse then replace the fuse if it pops again then theres a dead short somewhere, these are famous for bad starters and starter relays going bad, so see when fuse pops again if its when key is turned on or when you try to crank the motor, if its when cranking then its mostlikely the relay or starter, this main fuses would be in the engine compartment fuses box.
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