Author Topic: amp gauge bypass?  (Read 3829 times)

Offline black73cuda

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amp gauge bypass?
« on: November 16, 2008 - 02:10:48 PM »
Hi i have a rallye dash in my car and noticed that the amp guage is melted. Is there a way to bypass this totally and just run a aftermarket autometer volt guage?

How would i go about this? would i just simply leave the amp gauge unpluged and tape up the wires?

Also dose any one have a pic of the back of a rallye cluster with all the wires connected? i am not sure witch wire went where since i just installed a new wireing harness.

Sorry about all the questions lately.




Offline the_engineers

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Re: amp gauge bypass?
« Reply #1 on: November 16, 2008 - 02:16:15 PM »
Hi i have a rallye dash in my car and noticed that the amp guage is melted. Is there a way to bypass this totally and just run a aftermarket autometer volt guage?

How would i go about this? would i just simply leave the amp gauge unpluged and tape up the wires?

Also dose any one have a pic of the back of a rallye cluster with all the wires connected? i am not sure witch wire went where since i just installed a new wireing harness.

Sorry about all the questions lately.

Tie the ammeter wires together.

Check out RT-Eng.com for a bunch of Rallye dash info, including a pic of the wiring.
Brooks

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Offline GoodysGotaCuda

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Re: amp gauge bypass?
« Reply #2 on: November 16, 2008 - 02:18:27 PM »
You will lose a ton of your electrical system by leaving them unhooked. You will actually need to connect them (i know red connected to black sounds like vodoo, but it's not). Also something to consider is bypassing the likely melted bulkhead connections at the firewall. (unless you also replaced those, may want to check them).

To run a voltmeter, all you need is a ground, and switched 12v source (there is a nice male spade in the factory fuse box, radio hookup, etc)


Some reading:
http://www.madelectrical.com/electricaltech/amp-gauges.shtml
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1972 Barracuda - 5.7 Hemi + T56 Magnum

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nivvy

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Re: amp gauge bypass?
« Reply #3 on: November 16, 2008 - 02:23:36 PM »
I just butted mine together  :2thumbs:

Offline black73cuda

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Re: amp gauge bypass?
« Reply #4 on: November 16, 2008 - 02:44:29 PM »
so i need to join these 2 wires?


Do i leave this black deal unpluged?


Offline MEK-Dangerfield

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Re: amp gauge bypass?
« Reply #5 on: November 16, 2008 - 02:49:21 PM »
Yes,

  Use a bolt/screw to tie the thick red and black wires together. Heavily wrap in electrical tape afterwards. I would only do this as a temporary fix until you get another amp gauge, or convert to a volt gauge. You need to know what's going on...Or at least I do.   :grinyes:


   Mike

Mike

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nivvy

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Re: amp gauge bypass?
« Reply #6 on: November 16, 2008 - 02:59:15 PM »
I cut the ends off and used a big butt connector to put them together and put a bunch of electrical tape on them and put in an aftermarket volt meter  :2thumbs:

Offline GoodysGotaCuda

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Re: amp gauge bypass?
« Reply #7 on: November 16, 2008 - 03:01:16 PM »
Bolted mine together and put heat shrink over it. Never had a problem
Build Page: Goody's 'Cuda Build Page
1976 Dodge Warlock
1972 Barracuda - 5.7 Hemi + T56 Magnum

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Offline black73cuda

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Re: amp gauge bypass?
« Reply #8 on: November 16, 2008 - 03:04:37 PM »
sounds easy enough... so leave the black deal unpluged?

Offline MEK-Dangerfield

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Re: amp gauge bypass?
« Reply #9 on: November 16, 2008 - 03:35:56 PM »
sounds easy enough... so leave the black deal unpluged?

NO!!


   That cluster of black plugs tied together goes to the fuel, oil pressure, and temp gauges. It came off of one of them. It looks like the oil pressure gauge from here.
« Last Edit: November 16, 2008 - 05:07:44 PM by MEK-Dangerfield »

Mike

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Offline 422STROKER

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Re: amp gauge bypass?
« Reply #10 on: November 16, 2008 - 04:56:30 PM »
So it looks like He needs to add a pigtail to feed those gauges right?

Tom :dunno:
Tom
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Offline black73cuda

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Re: amp gauge bypass?
« Reply #11 on: November 16, 2008 - 11:20:29 PM »
here is a pic showing how it's wired now....is this correct?     (the 2 wires that i tied together were the only one's connected to the volt gauge?

Offline 73EStroker

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Re: amp gauge bypass?
« Reply #12 on: November 16, 2008 - 11:34:21 PM »
MEK is correct. That plug is the 5V feed to the one guage that has 2 bare posts. Your last photo looks correct. I would add the relay system in the light circuit which will relieve a good portion of current from flowing through the firewall plug. Also please consider the electronic 5V regulator (the little square box) as the original ones can freeze closed and you get 12V to the guages - then poof goes the guages. One of the listers here has had that happen. I built the little 5V one for $1.50 using the original can. Also then you discard the little suppression capacitor beside the regulator. Article is at the following address on how to build the regulator and the 2 internal parts required.

http://www.imperialclub.com/Articles/GaugeRepair/
Barry (Salmon Arm)