Anyone know about Airguide model # 656 tach it is 0 to 8000 with four wires out the back, black, red, yellow, and green. It looks like a smaller version of the early Sun tach. I want to run it on my flathead 8 ba, 12 volt negative ground. How to wire it would be helpfull. Thanks Speedy
Uually the black is ground, the red is switched power, the green is neg at the coil, the other one is to the lights. jerry
Airguides are a cool looking tach. I ran one in my '33 p/u. The 656 needs a sending unit, and they're tough to find. Good luck.
I am running an AIRGUIDE in my "A". I had the same problem, the sending unit was fried! I sent out to Williamsons Instrument Restoration and had converted to a newer Mallory sending unit. It is working great now. They are a great bunch of guys there, ask for Ron. http://www.williamsons.com/
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