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Stewart Warner amperes gauge shunt?

kenneth83

New member
Has anyone installed or have installed the stage 3 gauges? Does anyone know if the ammeter needs an external shunt?

And whats the deal, did these cars come with these gauges or were they simply a popular option?
 

letterman7

Honorary Admin
Most popular gauge for the time. Toss the ammeter - it won't tell you what you need to know - and put in a voltmeter.
 

Peter

Active member
Ammeters are historical, used when we had mechanical regulators and dynamos, not needed with alternators as the alternator automatically increases output to compensate load and provide a steady 13.8volts, the needle would stay in the middle anyway.
IF you are running a separate stand alone battery, for say a sound system and you want to see what the consumption is it would be useful in that application I guess. As Rick said, toss and fit a voltmeter.
 

kenneth83

New member
I was hoping you guys would think so! Much easier!!

Unfortunately, I think I fried the tach. I swapped the power and coil wire...now the wire doesn't go back to zero...just hangs around 7k or 2k or 5k...kinda wherever it wants and doesn't respond to (now wired properly. I`ve done quite a bit of 12V wiring too...total rookie mistake..
*very frustrated*
 

Peter

Active member
??? Input to the tacho should be diode protected or even have a crowbar so it would blow the fuse, strange. Sounds like either bin and new or strip and repair, if possible, the tacho, not you.*na-na-na*
 

Fuzz

Member
The Stewart Warner factory plant is about 25 minutes from my house, located in Lancaster County, PA. I visited them once and they were very friendly and helpful in helping me solve my SW III tachometer issues. They tested my tach and found nothing wrong with it, and it turned out there was a chafed tach wire which was hidden from sight behind my fire-wall. But at least they helped eliminate the tach as being the source of the problem. I think if you contact them they would be willing to help you out by fixing your tach for you. As I said, they were friendly and pleasant to deal with. Best of all, they didn't charge me a penny. Bonus. *rock on*
 

delbertinie

New member
I am in the process making a new dash I have a complete set of good working stewart warner gauges including a really rare (I think ) sw clock that keeps good time. If you are interested in them.

My tack is hooked directly to the coil. Im not sure but I don't think the amp is shunted

Im going digital so I won't need them just pm me if your interested.
 
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kenneth83

New member
So I have it wired properly. Must just be shot.
delbertinie, I too have a complete set, though I was not planning on using the clock (or water temp for that matter!) I appreciate the offer, but unless you would be willing to only sell the tach, I would pass. Thanks though!!*thumbs up*
 
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