Thread: strange electrical issue

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  1. #1 strange electrical issue 
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    '08 base model. not every time, but a few times over the last 2 months, while driving the power has cut out for a split second. headlights, dash lights, stereo, everything. it happens so quick i dont know if the engine dies. its like flipping a wall switch for a light off the back on pretty quick. tach and speedometer do its startup jump,the display in the dash goes through its start up thing, and seat belt dinger dings like on start up.
    i havent done any digging more than cleaning the battery terminal so far and hopin i might get some things to look at.
    08 grand prix NA3800
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  2. #2 Re: strange electrical issue 
    Killa Bee Scottydoggs's Avatar
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    check the small grounds on the trans bell housing, same place the neg cable bolts to. the wires start to break off the eyelets, you hit a bump and the wires move and power drops and comes back.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  3. #3 Re: strange electrical issue 
    GXP Level Member Turbocharged400sbc's Avatar
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    its very likely the ignition switch.

    if you have more than a couple keys and fob on your keychain, remove em, the less weight the less likely it is to happen
    ~James~ Psychotic Gearhead
    projects: 84 Cressida waGN~ 90 LN3 3800, equal length headers, T70, 89 700r4, misc parts,
    1994 Oldsmobile 442 (462ci-4wd-2 engines) L67/4t80e^2,
    00 Turbo Regal 608 fwhp 575ftlbs at 5500rpm, 98 WhippledRiv, 97 GTP
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  4. #4 Re: strange electrical issue 
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    Quote Originally Posted by Scottydoggs View Post
    check the small grounds on the trans bell housing, same place the neg cable bolts to. the wires start to break off the eyelets, you hit a bump and the wires move and power drops and comes back.
    ya ever been laying in bed- just about to fall asleep and something hits ya?
    happened to me last night. thinkin about the grounds ya mention wondering why they may be a problem.
    then it hit me- just as i was about to fall asleep. i had trans work done a few months ago. the problem started after that.
    08 grand prix NA3800
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  6. #5 Re: strange electrical issue 
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    Good call Scottydoggs.
    Op, let us know what you come up with.
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  7. #6 Re: strange electrical issue 
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    update:
    finally had warm enough weather to get my baby on jack stands, do some other work, and check out grounds.
    i put new pos and neg terminals on the battery as they had been used and abused plus checked the ground on the trans. removed the paint on the trans, cleaned up the ground terminals, put it back together, have driven about 500 miles, and havent had the issue return so far.
    08 grand prix NA3800
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  9. #7 Re: strange electrical issue 
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    Good job. Thanks for the update. ls is still working OK?
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  10. #8 Re: strange electrical issue 
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    Quote Originally Posted by mrbreezeet1 View Post
    Good job. Thanks for the update. ls is still working OK?
    hadda little elec issue since but cleaning the bat terminals and greasin em up took care of it.
    08 grand prix NA3800
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