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I have a couple of questions re' the center cluster gauges on my '74, I removed the cluster to replace the broken frame during a somewhat drawn out resto'/rebuild. The cluster was apart for some time which resulted in problem # 1. Some of the gauges have a shunt across the terminals which take a portion of the electric current, I neglected to note which shunt goes where (I am normally very good). Firstly, are the shunts interchangeable or must they be replaced on the exact gauge that they came off. Secondly, how many shunts should I have. Thirdly, on which gauges do the shunts go. Lastly, does anyone sell these shunts. Problem #2, Firing up the rebuilt engine, I started the engine and as I scanned the gauges for all the right numbers I noticed the temp' gauge had swung way over to the 3 o'clock position (200deg +), the motor had just started and was cool to the hand around the sender (brand new) and elsewhere. Any help with these problems would be most appreciated.
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Re: '74 Gauges.
Martin,
Click on the link below to see a picture that will answer most of your questions. I believe the shunts are interchangeable, and I don't know who sells them. Note that the temp gauge has a resistor across its terminals. I believe that if you didn't install it, or if you installed it incorrectly, that may be the cause of high temp readings.
Hope this helps!
-Pedro -
Re: gauges / resistors
Martin,
I restored the gauge cluster in my 68 and am a little familiar with what you are mentioning, but it may not be "exactly" the same. I'm not certain if the "shunts" you are referring to are the same thing as what I'm thinking of as a "resistor". It's been a couple of years since I had the cluster out, so I don't remember exactly, but two or three of the gauges have a wafer thin resistor with a "hair-fine" wire coiled around it. It was the same source of my problem when I re-positioned my gauge cluster and my fuel gauge pegged out at the 3 o'clock position.
If you're looking for a source to find these resistors new, then don't bother making a call to any of the larger parts suppliers. The times I did ususally resulted in an intellegence-insulting conversation with the in-house technicians, as well as a sales pitch to rebuild my gauges, usually at $45-50 apiece. I eventually found Redline Gauge and Clock Repair out of Humbolt, Tennessee (1-800-375-2310). He'll sell you the resistor at a cost of somewhere around $10. Hope this has helped. TBarr #24014Comment
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Re: '74 Gauges.
Thanks for the replys, the problem on the temp' gauge was an incorrectly installed shunt/resistor.Comment
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