Question about 1995 Buick Regal

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I have a short somewhere and it drains the batterry if I leave it on overnight If I disconnect the battery overnight it starts right up in the morning

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  • burmanville Apr 21, 2009

    Already tryed that9 disconnected the alternator wires battery was dead in the morning Just bought a new battery yesterday

  • burmanville Apr 23, 2009

    a volt meter of test light is that one of them things tha us use to check for electricity in a wall plug if so i have one

  • burmanville Apr 26, 2009

    The fuse is #3 Passenger side Underhood The manuel says it is for Powertrain Control Module (PMC), Fuel Pump/Oil Pressures switch, Feul Pump Relay, Fan Control#1 Relay

  • burmanville Apr 28, 2009

    When I take fuse#3 out the light stays on, with all the rest of the fuses in

  • burmanville Apr 28, 2009

    When i leave the fuse out and all other fuses in the light stays on

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  • Buick Master
  • 1,000 Answers

When you disconnect the battery cables, do you disconnect both or just the negative and how old is the battery. Sulfated cells in the battery will cause the same condition.

Most of the time the culprits are the glove box light or trunk light left on. However the light dimming module should turn them off after they have been on for 20 minutes or so on your vehicle.

I would start by disconnecting the wiring at the alternator and let it set over night and see if it starts in the morning.

Posted on Apr 21, 2009

  • 2 more comments 
  • Bruce Bracey
    Bruce Bracey Apr 21, 2009

    OK, we can rule those out.



    Do you have a volt meter and or test light?

  • Bruce Bracey
    Bruce Bracey Apr 24, 2009

    If you have a 12 volt test light (it must be 12 volt) you can disconnect the negative battery cable, put the test light between the battery negative and the battery negative cable ( in series) and you will see the test light come on.

    Start removing (1) fuse at a time until the test light goes out. When the light goes out, record the fuse name and let me know. We can start diagnosing from there.

    Good luck, let me know.

    Regards,

  • Bruce Bracey
    Bruce Bracey Apr 26, 2009

    The PCM will usually have a small parasitic drain on the battery. Leave that fuse out, with all other fuses in fuse box, does the light stay out?

    Let me know.

    Regards,

  • Bruce Bracey
    Bruce Bracey Apr 28, 2009

    Pull all fuses out. Insert one fuse at a time and record any that the light comes on then remove that fuse and go to the next.



    Did you remove the fuses from the under hood fuse box only? There is an interior fuse box located in the dash.



    Let me know.

    Regards,

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