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Old 06-16-2010, 08:17 PM
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Vintage Sun Tach Hookup model ST-602

Just purchased a '60's Sun Tach model SR-602 to use on my '27 Roadster rat rod, which is running a small block chevy with HEI distributor. It's a four wire hookup Ign. SW, ground, light and trigger. My question is where do I hook up the 'trigger' wire for an HEI? If it's the HEI, where? Any help is appreciated.
When I posted this answers from 2002 & 2003 came up, I'm hoping they will work. My wire colors don't match but the back of the Tach identifies what each wire is.


Last edited by 66chevy396; 06-16-2010 at 08:28 PM.
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Old 06-16-2010, 08:24 PM
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Trigger wire gets hooked to the post marked TACH, in thr cap right next to the 12v+ feed wire to the HEI.

Hope this isn't one of the Sun tachs old enough that they had a seperate trigger box, you will be out of luck if it is.
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