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2004 buick regal ls.....not cranking up but all the acc lights keep blinking on and off when i turn on acc and i turn on blinker it stop but no crank uo after all that

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Jeff Armer

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Acc lights keep blinking on and off ???? What ACC lights , you need to explain this better . Instrument cluster lights come on with the key on ? warning lamps - check engine light , ABS , air bag , oil , battery etc ... do they go off after a few seconds ? What happens when you turn the key to the start position , does the starter engage an spin the engine etc... Hows the battery an cable connections .

Posted on Jun 11, 2021

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  • Jeff Armer
    Jeff Armer Jun 11, 2021

    This is how the starter system works

    Circuit Description
    Moving the ignition switch to the Start position sends a 12 volt signal through the Crank Signal BCM, Cluster fuse in the Fuse Block - I/P to the BCM, IPC, and PCM to notify these modules that a crank status has been requested. At the same time 12 volts is fed through the PCM BCM U/H Relay fuse in the Fuse Block - I/P to the coil side of the CRANK relay. The PCM grounds this circuit when all parameters are met for starting the engine. This closes the CRANK relay allowing Battery Positive voltage through the CRANK fuse and CRANK relay in the Fuse Block - Underhood then through the Park/Neutral Position Switch to the S terminal of the starter solenoid. Ground is found through the engine block.

  • Anonymous Jun 11, 2021

    All the instrument cluster lights blink on and off they never stop blinking they keep blinking on and off and when I push the turning signal right or left it stopped but when I turn the blinker off does it again keep blinking on and off and after that the starter doesn't do do nothing won't even crank unless I play with it for like an hour and when I do get it crunk if I hit the turning signal the car stall out

  • Anonymous Jun 12, 2021

    The first thing i would do if this vehicle came to my shop , is hook up my scan tool an see if all the modules are talking ,an check for codes. The instrument cluster is also a module ( has a microprocessor inside ) Is on the serial data network , can have DTC'S - diagnostic trouble codes stored .



Joseph Wright

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The starter circuit goes through the gear sensor, and possibly other switches. If any are open, current doesn't make it to the starter. If Park doesn't work, try Neutral, as a test. If you can find a location for the shifter where it cranks, that would suggest the switch has come loose or shifted its position from where it should be.
Are there any starter noises, such as the click of the starter when you attempt to start? If a click or a chatter, the battery may be low.

Posted on Jun 11, 2021


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