The Ford Barn

zoegrant · 03-14-2020, 02:08 PM

I have a problem with my new Westach tachometer.
It is giving me erroneous information..first let me say how I have it hooked up.
This tach has two wires.

one wire of the tach is hooked up to the NEGATVE side of the coil. There is an independent wire not a tach wire but a wire from the NEG coil to the back of the distributor. I think that the tach uses the distributor wire as a ground as both the tach wire and the distributor wire are hooked to the same NEGATIVE coil terminal.
the other wire is hooked to the POSITIVE side of the coil.

I have tried switching the two wires around in the back of the tach. Still reads incorrectly. At idle, track reads 2500 rpm and when doing 35mph tach reads over 5000 rpm.
I have contacted the teck guy at Westach but haven't been able to cure the problem.
This is a 6v tach on a 6v electrical system....
Any suggestions ??

03-14-2020, 02:08 PM	#1
zoegrant Senior Member Join Date: Jun 2010 Location: tolland CT Posts: 773	An untactfull situation I have a problem with my new Westach tachometer. It is giving me erroneous information..first let me say how I have it hooked up. This tach has two wires. one wire of the tach is hooked up to the NEGATVE side of the coil. There is an independent wire not a tach wire but a wire from the NEG coil to the back of the distributor. I think that the tach uses the distributor wire as a ground as both the tach wire and the distributor wire are hooked to the same NEGATIVE coil terminal. the other wire is hooked to the POSITIVE side of the coil. I have tried switching the two wires around in the back of the tach. Still reads incorrectly. At idle, track reads 2500 rpm and when doing 35mph tach reads over 5000 rpm. I have contacted the teck guy at Westach but haven't been able to cure the problem. This is a 6v tach on a 6v electrical system.... Any suggestions ??