Interior lights Flicker?

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Thread: Interior lights Flicker?

  1. #1
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    Default Interior lights Flicker?

    As of lately, My interior lights have been pulsating/flickering when I turn them on. I can also sometimes see SLIGHT flickering in my headlights and tail lights. Any ideas from anyone? The only thing I can think of is maybe the battery is starting to loose some juice? and or bad connection? I don't have anything aftermarket electrical wise. What are your guys thoughts? any ideas would be appreciated!!! Thanks

    I tried searching and found nothing....
    Last edited by ootundra; 02-13-2011 at 02:17 AM.

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    Lurking Member WyomingMedic's Avatar
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    Default Re: Interior lights Flicker?

    Hmmm, I am not an experienced Tundra feller (YET), but I am an automotive wiring nut.

    My best guess would be battery based, but I doubt it is a "bad" battery. If you have a pulsing or flickering, it would indicate to me that there is a variable load on the power system OR something loose.

    If the flickering rhythmic at all?

    My first bet would be to check the connections at the battery. Especially the negative clamp. Clean them and give em a good tug, they should be stable and not move.

    Next move over to the alternator. Make sure all the cables (again, especially the ground) are firmly attached.

    I have seen batteries have a poor ground connection and rapidly go from poor to better contact and draw some weird currents while the charging system plays catchup then shutdown. Same with the alternators. Poor ground connections can change loads.

    If that does not work, I would look at the output of the alternator itself. While he truck is running, get a good FAST volt meter and put it on the battery posts then the alternator outputs. See if there is proper voltage and if it is fluctuating. Then check the voltages at the various electrical panels. I don't know what the Tundras use for voltage regulation, but it could be malfunctioning and you would not see that until some point AFTER the battery and charging system.

    As a final and worst case scenario, I have seen multiplexed electrical systems get wet and have some very bizarre symptoms (like antilock brakes randomly engaging). Watch to see if there is any correlation once once the system dries out (if it is wet, if not, no worries).

    Those are my best guesses. Sadly, electrical "ghost" problems can be some of the hardest to diagnose. It may be something VERY simple, or not.

    Good luck,
    WM

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    cmb
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    Default Re: Interior lights Flicker?

    Hopefully it's not rodent damage. Take a "flashlight tour" under your hood to make sure. Could be just getting started.

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    Default Re: Interior lights Flicker?

    Would seem to be a charging based concern. Does flickering go away when rpm's of engine are higher? And like WyomingMedic stated take good look at battery terminals for corrosion this can cause voltage drop/excess resistance.

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    Default Re: Interior lights Flicker?

    Quote Originally Posted by ToyotaTechnition View Post
    Would seem to be a charging based concern. Does flickering go away when rpm's of engine are higher? And like WyomingMedic stated take good look at battery terminals for corrosion this can cause voltage drop/excess resistance.
    Thanks for the replies...and a quick look under the hood seems like there is some corrosion around my battery terminals as Wyomingmedic and toyotatechnition said may be a cause. Hopefully it is as simple as giving them a cleaning...

    I'll keep you guys updated....

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    Senior Contributor Barney_Fife's Avatar
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    Default Re: Interior lights Flicker?

    corrosion causing bad ground IMO. if not at the battery, check the main ground wires to make sure htey arent corroded too. my guess would be a poor ground someplace.
    2007 Super White DC SR5 , TRD OffRoad; Sand Beige leather, 4.7, tinted windows, OEM running boards, tow mirrors with chrome covers, Armorlid tonneau, billet grille, aftermarket reverse sensors, flowmaster true duals with 3.5 rolled edge stainless tips, Sirius added via OEM module, 5000K HID lowbeams, KMC XD Hoss 20'' wheels in gloss black, Nitto Terra Grappler AT 285/55/20's, chrome door handle covers, smoothed and painted tailgate handle, 3 inch lift/levelling kit,1.5'' Rough Country lift blocks in rear, DVD headrest player/monitors, Rostra backup camera, SS bull bar with 6'' lights, Faux Carbon Fiber dash,console and door trim. Work stuff: red/blue LEDs in grille, headlight wig wag flasher, red/blue LED windshield light, red/blue LED deck lights in back glass, red/blue split 4 LED lights either side of license plate, wig wag backup and brake lamps. 100 watt siren and PA.

    Quote Originally Posted by steppy View Post
    what barney said sounds reasonable
    Quote Originally Posted by JMSinMD View Post
    what barney said sounds reasonable



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