[3300]

Hello. Under the dash ( now that I have all the new AAW wiring in, I want to hook up a tach. There is a white wire marked Tach. It goes through firewall, but under dash I can see it part way, does it come from the new AAW fuse panel ? Thanks

 

[acardon]

Hello. Under the dash ( now that I have all the new AAW wiring in, I want to hook up a tach. There is a white wire marked Tach. It goes through firewall, but under dash I can see it part way, does it come from the new AAW fuse panel ? Thanks

The white tach wire comes from the instrument panel through the firewall to the engine. The tach gauge gets power from the pink wire that powers the other gauges.

 

[hotrodg726]

the white wire runs from the tachometer to the coil. it is silly that AAW uses a white wire when 95% of tach makers use a green wire for the signal from the coil.

 

[acardon]

the white wire runs from the tachometer to the coil. it is silly that AAW uses a white wire when 95% of tach makers use a green wire for the signal from the coil.

My General Motors Ramjet wiring harness uses a white wire for the analog tach signal.

3300, there is a white wire from the fuse block that is used for the wiper motor switch.

 

[55 Tony]

If you happen to have something like an MSD box, you need to tap into the sensor wire on the distributor. Attaching it to the coil may fry your tach.

 

[acardon]

If you happen to have something like an MSD box, you need to tap into the sensor wire on the distributor. Attaching it to the coil may fry your tach.

MSD boxes have a tach signal wire.

 

[55 Tony]

MSD boxes have a tach signal wire.

Yes, I forgot about that.

 

[hotrodg726]

you are correct but you will look long and hard to find a tachometer that has a white signal wire, it is most commonly green and the white wire is for the light inside the tachometer.

 

[3300]

The white tach wire comes from the instrument panel through the firewall to the engine. The tach gauge gets power from the pink wire that powers the other gauges.

Hey Don. Hope I’m getting this straight, new engine harness under dash ( that has the (( white. Tach/coil) wire with it is out in engine bay now. The white wire goes to - on coil.
Under dash on harness with other wires it’s plugged into its mating connection, what I can’t see or trace, is where does other end of wire go ? Looks like to new fuse panel I could be wrong,? ( like I said I can’t trace other end under there. With that in mind, do I just run a wire from remote tach to - post on coil aswell ?
Thanks. Hope this is clear as mud

 

[vich57]

As a minimalist, I'd hate to see you run an extra wire if there's one in the new AAW harness that's meant for the job.
Do you have a schematic or wiring diagram for the new harness? That should help sort out what you're looking at.

 

[3300]

As a minimalist, I'd hate to see you run an extra wire if there's one in the new AAW harness that's meant for the job.
Do you have a schematic or wiring diagram for the new harness? That should help sort out what you're looking at.

 

[3300]

As a minimalist, I'd hate to see you run an extra wire if there's one in the new AAW harness that's meant for the job.
Do you have a schematic or wiring diagram for the new harness? That should help sort out what you're looking at.

Top photo. White( tach/ coil) comes out firewall to coil / distributor
Bottom is under dash with other. Plugs in with others. But shows it by itself top right in diagram. So if anyone has installed thi I need to know where it is is the mass of wires under dash, if need be I’ll have to drop column and everything to trace this, also. Remote tach maybe ties into this wire under dash. Thank you

 

[acardon]

Top photo. White( tach/ coil) comes out firewall to coil / distributor
Bottom is under dash with other. Plugs in with others. But shows it by itself top right in diagram. So if anyone has installed thi I need to know where it is is the mass of wires under dash, if need be I’ll have to drop column and everything to trace this, also. Remote tach maybe ties into this wire under dash. Thank you

It should be in that group of wires that go to the original instrument panel. Did you install the harness? It may be folded back and taped up in the wires going to the panel. It probably won't be just hanging loose.

 

[3300]

It should be in that group of wires that go to the original instrument panel. Did you install the harness? It may be folded back and taped up in the wires going to the panel. It probably won't be just hanging loose.

Got it thanks. Was alone in a connector. What a head rush