Thread: HEI Tach wire

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Originally posted by kschilling
As we say in the Army...... HOOAH!!!!!!!!! That was it. I simply thought that it broke off a "male/female" connection somewhere in the wiring harness.

Yes, I did prep the wire and pre cut the end.... thought I would simply re-attach it and it would be done. Wrong answer.

My next challenge is to find a replacement. I've already hit the auto parts stores and all I get is the "Goat in the Headlight look".

I can sodder the end back on.

Question: Do I really need it?

you could solder it back on probably, but i i think all it does is keep the radio noise down. jump over it and see what it does.

One more thing.... the wiring diagram in my Chilton's Manual calls it a "Tach Filter Assembly".

Originally posted by kschilling
One more thing.... the wiring diagram in my Chilton's Manual calls it a "Tach Filter Assembly".

go to the junk yard, all of the GM cars with tachs has then.

That was it. I touched the wire back to the tip and the Tach came to life. I think I'll try and sodder it back on rather then jumping it.

You guys were amazing. Thanks for the help and support. I was at my wits end today!!!!!!!! Thanks again guys.....

Serving America Proudly..... US Army - Fort Hood, TX.

The Tach filter is supposed to stop voltage spikes as well as quiet the radio.

Classic Instruments has a tach filter that should work. It has three wires: In, Out, Ground.

http://www.classicinstruments.com/index.phtml?catid=5

I think I might go back to the auto parts store in the morning and ask for an In Line Radio filter.... just in case the sodder jog doesn't work.

would i have to have one of these condencers if i had a point distributer and didnt have a radio? after market tach. what bout with an electric distributer if i buy a new tach will it come with this filter?

Originally posted by Henry Rifle
kschilling,

Are there solder marks on the wire that look like those on the condenser? If they look alike, you've probably found the connection.

You could start the car, touch the wire to the end of the condenser and see if the TACH works.

bg489,

I think you have it backwards. If you look closely in the picture, you can see the words TACH on the left and BAT on the right. Right above that are (from left to right) C- GRD B+

In any case, he's not looking for where to attach to the distributor, he's trying to find out where to attach it to the signal lead that goes to the tach inside the car.

oops