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    Author Topic: Gauges not working  (Read 4475 times)

    Offline battrm

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    Gauges not working
    « on: March 20, 2015 - 01:37:52 PM »
    I removed my rally gauge cluster to hook up the tachometer.  I just pulled it away from dash a little bit.
    I didn't unhook the wires.    I just hooked up tach.  The tachometer works good but now my gas gauge and temp gauge doesn't work anymore.  Everything looks correct or the way it was hooked up.  Any tips on what I may
    Have done.  Is there any fuses on the back of guages? 
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    Offline jhaag

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    Re: Gauges not working
    « Reply #1 on: March 20, 2015 - 04:01:56 PM »
    probably lost the ground. make sure the gauge cluster housing screws are tight to the frame.
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    love 70 Challengers

    Offline JayBee

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    Re: Gauges not working
    « Reply #2 on: March 20, 2015 - 05:57:01 PM »
    Does your oil pressure gauge work? The oil, temp and fuel get their power from the 5 volt regulator on the back of the cluster.
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    John

    1970 Barracuda convertible
    2014 Toyota Avalon

    Offline battrm

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    Re: Gauges not working
    « Reply #3 on: March 20, 2015 - 08:34:44 PM »
    No it doesn't work. What does the 5 volt regulator look like.  Where could I buy one?
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    Offline 73440

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    Re: Gauges not working
    « Reply #4 on: March 20, 2015 - 08:40:58 PM »
    This might be it

    http://www.radioshack.com/-5v-fixed-voltage-regulator-7805/2761770.html

    I took the 7805 info from another thread elsewhere.
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    Offline rUNCHARGER

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    Re: Gauges not working
    « Reply #5 on: March 21, 2015 - 12:13:04 AM »
    Most likely you pulled one of the wires of the voltage limiter.

    Sheldon
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    Offline TelisSE440

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    Re: Gauges not working
    « Reply #6 on: March 21, 2015 - 02:27:23 AM »
    Quote from: rUNCHARGER on March 21, 2015 - 12:13:04 AM
    Most likely you pulled one of the wires of the voltage limiter.

    Sheldon
    :iagree: Happened to me sometimes..
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    Offline JayBee

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    Re: Gauges not working
    « Reply #7 on: March 21, 2015 - 10:17:16 AM »
    Quote from: battrm on March 20, 2015 - 08:34:44 PM
    No it doesn't work. What does the 5 volt regulator look like.  Where could I buy one?

    It's on the back of the cluster, up near the fuel gauge. An original "mechanical" one will have a tan circuit board. The pictured one is the new and improved "solid state" version. They're found on ebay all day long or you can check with one of our board sponsors.
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    John

    1970 Barracuda convertible
    2014 Toyota Avalon

    Offline battrm

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    Re: Gauges not working
    « Reply #8 on: March 21, 2015 - 10:03:28 PM »
    Thanks.  I will get a new one and go from there. 
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    Offline dodj

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    Re: Gauges not working
    « Reply #9 on: March 22, 2015 - 08:44:03 AM »
    Quote from: battrm on March 21, 2015 - 10:03:28 PM
    Thanks.  I will get a new one and go from there.
    I would be surprised if you need a new one. If the gauges were working before you moved the cluster, and now they aren't, you are most likely looking at a wire or ground that is loose or missing(as previously mentioned). Pull your cluster out a bit and double check all the wires and then reinstall with all four mounting screws to the dash frame. And I'll bet they start working again.  :2cents:
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    Scott
    1973 Challenger  440 4 spd 
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    Offline Racer57

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    Re: Gauges not working
    « Reply #10 on: March 22, 2015 - 10:07:53 AM »
    Clip one end of a very long wire (speaker wire, etc ) onto the cluster and the other end onto a good ground. This will allow you to have the cluster in your lap while you check out everything.
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    Offline marc70challenger

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    Re: Gauges not working
    « Reply #11 on: March 22, 2015 - 01:37:08 PM »
    Quote from: Racer57 on March 22, 2015 - 10:07:53 AM
    Clip one end of a very long wire (speaker wire, etc ) onto the cluster and the other end onto a good ground. This will allow you to have the cluster in your lap while you check out everything.

     :iagree:   I'd start with checking ground.   Was my issue with switch panel .. did this quick check ... then perma fix.   :ylsuper:
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    Offline Blasterb

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    Re: Gauges not working
    « Reply #12 on: July 01, 2015 - 07:29:41 PM »
    I just built one for about $5. Took about 15 minutes. Got the design from an ALLPAR thread. Works perfect!
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