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Thread: I need a power source that stays on during cranking.

  1. #11
    Beyond Help Napalm's Avatar
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    what gage did you say this was? make and model?

    I bet there's a setting or alternate wiring method.

    also wonder - would it work off it's own battery, IE like a 9 volt. or say 8, AA batteries in a box
    If Guns Kill people, then Spoons Cause Diabetes

  2. #12
    Moderator LDM's Avatar
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    How about one of these fuses?



    I haven't checked but I'd assume anything powered by the Power Train Relay would stay on during cranking since it powers things like the coils and injectors.
    Len

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  3. #13
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    The gauge is an apsx b2 digital boost gauge.
    There is no setting for wiring it differently.
    Does anybody have a diagram/guide for drivers kick panel fuse box?
    I was hoping to not have to rewire it to underhood if I can avoid it.

  4. #14
    Moderator travis gore's Avatar
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    Quote Originally Posted by ws98ta View Post
    The gauge is an apsx b2 digital boost gauge.
    There is no setting for wiring it differently.
    Does anybody have a diagram/guide for drivers kick panel fuse box?
    I was hoping to not have to rewire it to underhood if I can avoid it.
    might look here http://forum.grrrr8.net/showthread.php?t=20281 I have not found a diagram for the kick panel as of yet
    2009 Karma Metallic G8 GT The best gift you can give to someone is your time,because you're giving them something that you can never get back

  5. #15
    Beyond Help Napalm's Avatar
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    OK so let me make sure I've read it all correctly.

    as wired now - gage comes on, car starts sequence - gage goes off, then comes on again because engine cranking - when it comes on the second time, car is idling and the gage resets in a way that it sees idle state manifold pressure to be 0.

    what you want is for the gage to read idle state as XX inHg - and then progress from there. and your gage is the 0-30 ranged model


    so I have to ask - how much boost do you think you are running?

    Of the boosted cars I've worked on I've never had this issue with a gage - usually they have settings or dip switches that allow configuring for their use
    If Guns Kill people, then Spoons Cause Diabetes

  6. #16
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    Quote Originally Posted by ws98ta View Post
    I need a power source for my gauges. The issue is I need them to power up with key on and stay powered up during cranking.
    I am hoping I can just use a fuse tap at the drivers side fuse box because that's where it's wired now.
    Does anyone know which fuse will be on and stay on during cranking?
    The reason is my boost gauge re zeros after every power up. So it doesn't rezero till the engine is running and it thinks 22"hg is 0.
    another thought is setting them up on a time delay relay. so you energize it with the key to the on position it trips the relay, the relay stays on unless power is cut for so many seconds. so once its energized(a millisecond later) crank it, and power should stay on, and since the power wasnt off for long enough it should keep it all on... i used this as a sort of turbo timer for my oil scavenge pump.

    a company called wolsten tech makes positive switching relays with a time delay funchtion, they are called TDR-p relays. you may check that out, it might suit your needs, i'd ask them specefically though if that functionality works for what you're trying to do.
    Ron
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  7. #17
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    After some looking it seems like the heated seat circuit should work. I will be switching the fuse tap tonight and will update thread with results.
    Thanks for all the suggestions.

  8. #18
    Moderator travis gore's Avatar
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    Quote Originally Posted by ws98ta View Post
    After some looking it seems like the heated seat circuit should work. I will be switching the fuse tap tonight and will update thread with results.
    Thanks for all the suggestions.
    I hope that this works out for you


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  9. #19
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    Do you not have it wired to an ignition-on power source now? I wonder if the voltage drop during start up is your problem... which will be a fun little project to fix.
    MGM GXP - M6, sunroof, and a whole lot of fun.

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