Thread: DIC HVAC gone..

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  1. #1 DIC HVAC gone.. 
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    well i guess the cars pissed im trying to sell it, because now the HVAC and DIC are glitching..

    Heres whats going on, yesterday after starting the car the AC and DIC hesitated for about 30 seconds before turning on, then again it was about 2 mins before it turned on.

    Now today neither would turn on, so i unhooked my amp and sub setup thinking it was draining to much power.. Well the fuse is getting spikes around 4v to 7v and aslong as the HVAC is set too off the DIC will flicker a few times, then turn on and stay on. But any attempt to turn the HVAC on kills the DIC.

    HVAC works on setting 5 and the compressor is coming on and blowing cold air. But still wont let DIC come on, and it hesitates about 10 to 15 seconds before HVAC works on setting 5.

    haaaalp.. im lost on this one, is my BCM just dying off some more? the BCM is already faulty and won't let the interior lights work.
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  2. #2 Re: DIC HVAC gone.. 
    GrandPrix Junkie PurpleGuy's Avatar
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    sounds like a ground issue to me...but if the BCM is already a known problem it could be that too.
    2001 Regal GS, PLOG, 3" DP, 1.9's/L76 springs. 21* of timing on a 3.4"
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  3. #3 Re: DIC HVAC gone.. 
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    well if it was a ground issue wouldnt the DIC always flicker? once it like builds up enough power it stays on.
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  4. #4 Re: DIC HVAC gone.. 
    GrandPrix Junkie PurpleGuy's Avatar
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    it may be randomly be grounding and ungrouding itself causing it to work sometimes but not others.
    2001 Regal GS, PLOG, 3" DP, 1.9's/L76 springs. 21* of timing on a 3.4"
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  5. #5 Re: DIC HVAC gone.. 
    GT Level Member Tea Time's Avatar
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    DIC' s SUCK! i have 2 gtp's and neither dic work ...check the wire harness in the engine bay that runs around the a/c condenser to verify that its not chaffing and shorting out.

    '00 GTP - Summer Toy
    '97 GTP - Project
    '99 GT - Gone (Frame Rotted)
    '98 SE - Gone (Parts Car)
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  6. #6 Re: DIC HVAC gone.. 
    GrandPrix Junkie PurpleGuy's Avatar
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    FWIW my DIC's lights would randomly flicker...replaced the bulbs and its been fine ever since.
    2001 Regal GS, PLOG, 3" DP, 1.9's/L76 springs. 21* of timing on a 3.4"
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  7. #7 Re: DIC HVAC gone.. 
    GT Level Member Tea Time's Avatar
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    I've got a thread on DIC's not working, i haven't resolved my issue yet (cuz i'm lazy) but another guy fixed his dimming dic by doing an "ignition saver mod"....fwiw, i hacked my ignition harness apart for that fix and it didn't work for me.

    Where the op's problem is both dic and hvac, it shouldn't be too hard to find the issue should it be shorting out or grounding poorly

    '00 GTP - Summer Toy
    '97 GTP - Project
    '99 GT - Gone (Frame Rotted)
    '98 SE - Gone (Parts Car)
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  8. #8 Re: DIC HVAC gone.. 
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    k just noticed this, in park with the blower motor set too off, the light of the AC compressor is on. its not resposive to turning it off with the button, i have to set the AC controls to the notch above MAX.

    If i try and turn the blower motor on, the AC Light turns off and the headlights dim very bad, but if i put the car in drive they light up all the way..

    what... the... ****
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  9. #9 Re: DIC HVAC gone.. 
    GrandPrix Junkie PurpleGuy's Avatar
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    im gonna have to say BCM
    2001 Regal GS, PLOG, 3" DP, 1.9's/L76 springs. 21* of timing on a 3.4"
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  10. #10 Re: DIC HVAC gone.. 
    SE Level Member jmt455's Avatar
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    Mine did the same things. It was the ignition switch.
    All OK after replacing it.
    83 Bonneville wagon
    08 G8 Base
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  11. #11 Re: DIC HVAC gone.. 
    GT Level Member tdm571's Avatar
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    I wasn't aware that the BCM had any control over the HVAC system. Someone please correct me if I'm wrong.
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