Tach Wiring Rally Dash 1976

[gtoguy3]

I am trying to put it back together.

I removed the gauge cluster and found burned path from ignition to water-oil pressure gauges.

I'm going to solder in a jumper, but the tach connector is just lying under the dash, and I'm using a 1974 Pontiac service manual that doesn't show where these wires go.

One looks like it goes to the fuse box to a 12v source.

Can anyone tell me where the second wire goes and is there an exemplary wiring diagram for a Trans Am?

I will buy a manual.

That laminated year one 76 TA wiring diagram is useless. It doesn't show the cluster, just the connector wiring.

Thanks.

 

[Brentco]

Here you go.

 

[gtoguy3]

Here you go.

Thanks.

I found the tach connector.

Both metal posts were positioned incorrectly on the cluster, so it would not plug in.

Easy fix.

 

[Brentco]

They make very good reproductions of the cluster circuit boards if you need to replace that someday, just FYI.

I also resoldered/relaminated some circuits to fix mine rather than get a new one, because the quality of reproduction parts is such a crapshoot.

I eventually did put in a repop board, and the quality is top-notch.