Rallye Gauge help

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    Author Topic: Rallye Gauge help  (Read 2550 times)

    Offline MoparMan440

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    Rallye Gauge help
    « on: April 02, 2005 - 11:33:56 AM »
    I'm in the process of converting to Rallye Gauges and I'm having a few problems. I can't get the tach to work I ran the wire from the negative side of the coil and the power wire to the gauge. When I run the car nothing happens. Do you guys think I have a bad tach I have signal at both wires after checking. I don't have the cluster fully installed because I wanted to make sure it worked. I mention this incase it needs to be grounded. Thanks in advance for any advice !

    Also a special thanks to Maxcuda for posting the easy to follow instruction in an earlier post.  :thumbs:
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    Offline MEK-Dangerfield

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    Re: Rallye Gauge help
    « Reply #1 on: April 02, 2005 - 01:17:46 PM »
    Yes, you will need to ground the case to get the tach. to work. I wouldn't be surprised if it was dead though. Most of them do die at some point. Many of us have had them rebuilt.

      Mike
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    Mike

    1970 Challenger - SOLD
    2016 SXT+.  1 of 524 SXT+'s in Plumb-crazy for 2016.

    Offline MoparMan440

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    Re: Rallye Gauge help
    « Reply #2 on: April 02, 2005 - 01:21:05 PM »
    I was thinking it might be dead but really didn't know for sure. I there a certain place the ground need to go ? Or if the case self grounded when mounted in ? Thanks for the help !
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    Offline MEK-Dangerfield

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    Re: Rallye Gauge help
    « Reply #3 on: April 02, 2005 - 01:26:41 PM »
    If the tach is out of the cluster, you can run a wire to one of the nuts on the back of it. If it's still in the cluster, then you could just set the cluster back in place and put one screw in it so it makes contact with the dash frame.

      Mike
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    Mike

    1970 Challenger - SOLD
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    Offline MoparMan440

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    Re: Rallye Gauge help
    « Reply #4 on: April 02, 2005 - 01:42:22 PM »
    Thanks for the help Mike ! I'll give it a shot today and see what happens.

    Gary
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    Offline MoparMan440

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    Re: Rallye Gauge help
    « Reply #5 on: April 02, 2005 - 07:03:10 PM »
    I set every thing up with the gauges bolted in and the car wouldn't start. If I disconnect the coil wire the car fires right up. It almost as if I'm grounding out the coil so there's no spark. Could this be from a bad gauge ? I had a spare lying around and it's in really bad shape but I hooked it up and the car ran and the needle moved. Now I know that gauge is broken so now sure if the response is accurate however the car would run . Any ideas ? :dontknow:
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    Offline MEK-Dangerfield

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    Re: Rallye Gauge help
    « Reply #6 on: April 03, 2005 - 06:50:05 AM »
    Ahhh, don't you just love these type of problems? I had an old tach. that did the same thing. I would start the car with it disconnected. As soon as I would connect it, I could hear the idle slow down. I couldn't start the car with it connected either.  :stomp: :stomp: :stomp: Apparently there is something in there that is drawing more current than it should.

      Mike
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    Mike

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    Offline MoparMan440

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    Re: Rallye Gauge help
    « Reply #7 on: April 03, 2005 - 03:02:47 PM »
    Sounds like I should send the tach out to have it rebuilt unless you have another suggestion. By the way thanks for all the help !  :wave:
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    Offline MEK-Dangerfield

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    Re: Rallye Gauge help
    « Reply #8 on: April 03, 2005 - 03:35:50 PM »
    For what it's worth, I never bothered to figure out what was wrong with that tach. that caused my engine not start. It was a 7K tach. that wasn't correct for my 70 setup anyway. It seemed to work fine, but cripes, I WOULD like to start my car  :laughing: :laughing: :laughing: I had another 8k tach. that I sent out for rebuild, and I have had NO problems since.  :grinyes:

      Mike
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    Mike

    1970 Challenger - SOLD
    2016 SXT+.  1 of 524 SXT+'s in Plumb-crazy for 2016.

    Offline MAXcuda

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    Re: Rallye Gauge help
    « Reply #9 on: April 03, 2005 - 10:14:09 PM »
    Quote from: MoparMan440 on April 02, 2005 - 11:33:56 AM
    Also a special thanks to Maxcuda for posting the easy to follow instruction in an earlier post.  :thumbs:


    You are welcome.  I had my tach rebuilt with a stock board for $125 at http://www.autoinstruments.com  They do great work, but its not their fault that the original tach boards were junk.  I think I will try one of these http://www.realtimeengineering.com/mopar/tachboard/tachboard.htm sometime in the near future.  They were featured in Mopar Muscle.  Gives the tach two calibration points, 1k and 4k rpm instead of just 1k.  Also supposed to react much faster.  And boy is the factory tach ever laggy!
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    Offline GregGarner

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    Re: Rallye Gauge help
    « Reply #10 on: November 08, 2005 - 05:37:44 PM »
    The tach that made the car not run has an internal short on the printed circuit board. Probably the resistors fried and shorted out. This places a direct short from the
    minus side of the coil to ground, like a kill switch!

    You need to replace the tach board inside that tachometer. I sell a kit that you can install yourself that will solve the problem, see my website for more information:

    www.rt-eng.com

    GregGarner
    www.rt-eng.com
    Home of the Mopar Tach and Clock repair kit
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