I purchased this new tach from BKRider and the single fire adaptor from e-bay. I have my tach hooked up to an external 12V supply and the tach does initialize (0 to 8K and back)) when it is pluged in.
Each coil shoul have a - and a + and the adaptor wires should go to -
With the engine idling, when I measure from the bike ground to any of the 2 wires on each coil, I get a + reading on all 4 terminals( one red and one black). I did it again and the same + + + + readings. I know that the black should be the - and I hooked up the adapter to these terminals.
Start the engine but the tach stays at 0...
What am I doing wrong here and why the + reading from both terminals of the coil? Any help is more than welcome.
With any adapters no tach wires go to the coil. The problem with these adapters is that they are bulky and hard to hide. That is the reason I got this slim one( just 3 wires and no box) on ebay that did not worked out for me. But I will build my own next week and sell this one on ebay for the Harleys.
http://www.bkrider.com/BKRider/skusearch_v3.asp?scriteria=C01160541
This is a no name for a "dual fire system" tach
You can also buy from them the single fire adapter if your bike is a dual fire...or bild one for cheap(like me). Mine does bounce a bit and I would be happy to find out where (based on the Harley schematic above) can I connect the 10K-1/2W resistor to ground to prevent that. Somebody should know about this.
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