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Stock 510 tach help


oldgasman

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Most stock tachs I've seen have a black wire, a green wire and 2 white wires. The white wires are the only ones that go to the engine compartment and connect to the positive side of the coil. Black is ground and green is the power wire (switched or otherwise). You may already have a harness for the tach taped with blue tape to your dash frame. This thread from over on the Realm might be helpful:

 

http://www.the510realm.com/viewtopic.php?f=32&t=25745&hilit=tach

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I thought I did say stock tach to a dizzy dist.

Two wires off tach go to eng compartment

1- black with green

2- black with white

''Dizzy'' is just slang for distributor, not a type. Basically, you hook up the tach in series, so if you have a ballast resistor the wires go in between it and the coil. If its electronic, the tach wires go between the igniter and coil positive. Cut the positive wire and splice tach wires in between. I can't remember which wire goes to which side but it only works one way. My stock tach wires shorted between themselves so the car would run but tach wouldn't work, I had to run new wires to everything. If you have this problem...

 

Green- 12v positive switched

Black- ground

White(x2)- tach loop to coil positive in series

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