Thread: Boost gauge light not shutting off..

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  1. #1 Boost gauge light not shutting off.. 
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    I've been attempting to hook up the light on my boost gauge for months now trying everything I can think off. Finally I broke down and bought a fuse tap and wired in power from the radio fuse that's all good next I grounded the gauge and the light works great but it won't shut off. I've tried everything and I can't get it to shut off so I've been just plugging in the ground at night and unhooking it when I shut the car off. Very cheap and cheesy and I'm sick of it. Any suggestions guys??

    Btw I have an 04 comp g
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  2. #2 Re: Boost gauge light not shutting off.. 
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    That's odd because it should shut off once the radio shuts off. You could go to radio shack and buy a switch and splice it into the power wire for the gauge. Then you can shut the light off any time. Or you can skip that and tap into the fuse that turns the interior lights on when it gets to dark.
    40th Anniversary GTP. No name brand HAI. Partially clogged cat.
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  3. #3 Re: Boost gauge light not shutting off.. 
    I live here. stealthee's Avatar
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    The radio fuse is constant hot for radio memory. Change it to a switched hot fuse.


    2011 Mitsubishi Lancer GTS - DD mode
    1991 Mitsubishi 3000GT - Many mods to come
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  4. #4 Re: Boost gauge light not shutting off.. 
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    Quote Originally Posted by stealthee View Post
    The radio fuse is constant hot for radio memory. Change it to a switched hot fuse.
    Oh yeah your right. For some reason I was thinking the 12v accessory/remote turn on.
    40th Anniversary GTP. No name brand HAI. Partially clogged cat.
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  5. #5 Re: Boost gauge light not shutting off.. 
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    I've tapped into every fuse and no dice guys.. I Don't understand..
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  6. #6 Re: Boost gauge light not shutting off.. 
    I live here. stealthee's Avatar
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    You need a test light.


    2011 Mitsubishi Lancer GTS - DD mode
    1991 Mitsubishi 3000GT - Many mods to come
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  7. #7 Re: Boost gauge light not shutting off.. 
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    I'll have to borrow one from work and check it out.
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  8. #8 Re: Boost gauge light not shutting off.. 
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    i have a 02 gtp how do i hook up my gauge to read my boost
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  9. #9 Re: Boost gauge light not shutting off.. 
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    http://www.grandprix.net/upgrades/boostgauge.html

    Read that, it will help you. (in reply to 951gtpsleeper)
    Last edited by brugg125er; 04-23-2015 at 06:22 PM. Reason: I didn't click reply with quote
    40th Anniversary GTP. No name brand HAI. Partially clogged cat.
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  10. #10 Re: Boost gauge light not shutting off.. 
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    Figured it out. Tapped into yellow wire in in the plug under the Fuse block.
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  11. #11 Re: Boost gauge light not shutting off.. 
    SE Level Member TheYanz's Avatar
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    Quote Originally Posted by Slopar00 View Post
    Figured it out. Tapped into yellow wire in in the plug under the Fuse block.
    It's been about 3 months, hopefully everything's still good for you. From what I know, those YELLOW wires are for the airbags & sh1t. I, personally, would stay far away from those wires. I'm always terrified to even brush up against any of those wires while doing any type of work in any area where those wires are present. I'm currently looking to connect up lighting for a newly installed mechanical boost gauge. I've been monitoring the boost for years with an electronic Scan Guage II mounted behind the steering wheel...
    99' Black GTP/ '03 Motor. 3.4 MPS, 1.9 Rockers, Ported SC & TB, SD Headers, FastKatt Tune, 2.5" Exhaust, Dual Tips, 104's .055/ 180*, STBBs, 6000K HIDs + 6000K HID Fogs, Interior LEDs + Red LED Switches, 1,250w Infinity Sub, Red Calipers, NiCop Brake Lines.
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  12. #12 Re: Boost gauge light not shutting off.. 
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    i used the wiper fuse. works dandy.

    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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  13. #13 Re: Boost gauge light not shutting off.. 
    GT Level Member mguzzo's Avatar
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    why didn't you tap into the panel dimmer switch output? then the light will be off when your headlights are off and you can control the brightness with your other panel lights.
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    "Silver Bullet" 98 GTP Coupe: Stock, rust free, and broadsided.
    Old '98 GTP Coupe: VS Cam, 3.0, S2IC, 42.5#, TOGs, N*/LQ4, Corsa. it once ran a 13 flat
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  14. #14 Re: Boost gauge light not shutting off.. 
    SE Level Member TheYanz's Avatar
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    Actually, I think I know which yellow wire he was talking about. He said fuse box, but if you open the driver's side door & look on the side of the steering wheel, there's a panel that pops out. You can unplug the wiring harness & tap into the 2nd yellow wire from the right on the top row of wires. That won't allow you to dim it but it will behave EXACTLY as the headlights do. Even when you use your keyless entry to lock & chirp the stock alarm, the boost gauge will light up in sequence with that. Pretty cool You can use the 13 mm bolt back there that bolts into the chassis as a ground post. Just loosen it up, strip a wire & loop it around the bolt then tighten it back up. Lol I was out of electrical wiring so I just used some 16 gauge speaker wire for the project ;D
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  15. #15 Re: Boost gauge light not shutting off.. 
    SE Level Member TheYanz's Avatar
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    Maybe it was 14 gauge... I don't remember. Seemed pretty stout. Plus I had had a few beers & it was like 3 in the morning & I had work at 10am the next day
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