Tachometer wiring

84 elco

84 elco

Not-quite-so-new-guy
Aug 7, 2018
38
18
Does anyone know where the wire off of the distributor would hook up to for the tachometer it’s all cutlass dash and rally gauges came factory with the tach I’ve found information that it’s the white wire for the tach on the the plug for the cluster but can’t find where the wire off of the distributor and that white wire would make a connection Ive seen on some other discussions about Grand Prix’s that there’s a spade connector under the dash which would make sense the cutlass originally had a wire that ran threw the firewall that I think was what went to the distributor but I can’t find a connection of any sort to hook that to under the dash
 
Ribbedroof

Ribbedroof

Comic Book Super Hero
Supporting Member
Jan 4, 2009
2,861
113
Wellston, OK
Holy run-on sentence, Batman!

I can't speak directly to Cutlass, but the Chevrolets have a black single Packard connector under the dash for the filter harness to connect to.
 
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Bonnewagon

Bonnewagon

Geezer
Sep 18, 2009
6,236
113
Queens, NY
Pat, I'd like to buy some periods and a comma. Badump- bump. My experience is that the tach wire was buried in the harness and if you don't have the tach option then good luck finding it. Much easier to run a dedicated tach wire straight from the HEI terminal to the back of the tachometer. EZPZ.
 
84 elco

84 elco

Not-quite-so-new-guy
Aug 7, 2018
38
18
Pat, I'd like to buy some periods and a comma. Badump- bump. My experience is that the tach wire was buried in the harness and if you don't have the tach option then good luck finding it. Much easier to run a dedicated tach wire straight from the HEI terminal to the back of the tachometer. EZPZ.
I did just find it this morning, it’s in a super ****ed up spot. Little Connector pops out of the wiring harness up behind the radio pretty much with maybe an inch of wire. Pain in the *ss to find it and get it connected but I think I’ve got it. Had to trace it all of the way from the cluster plug to find it. I’ll try to get a picture of it when I’m back home later
 
Gonzo1970

Gonzo1970

G-Body Guru
Supporting Member
Sep 30, 2018
513
93
I ran a dedicated, but if you do, you're going to need a filter for the needle not to jump all over the place.

-Gonz
 
84 elco

84 elco

Not-quite-so-new-guy
Aug 7, 2018
38
18
I ran a dedicated, but if you do, you're going to need a filter for the needle not to jump all over the place.

-Gonz
Yeah I’ve got it hooked up the way it originally was but there’s no tach filter just a brown wire whip from that little connector under the dash to the distributor still might need to install one I’m going to try it and see how she works without it
 
Gonzo1970

Gonzo1970

G-Body Guru
Supporting Member
Sep 30, 2018
513
93
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