12Volt switched + tach wiring.

[unclepunchy]

Hi folks,

Installing an aftermarket tach, 73 Duster.

I have my ground done and my green wire to negative coil. Can I use the following from my fuse panel for the 12 volt switched and the dimmer / / /instrument light?

 

[67Dart273]

The only "switched" in the fuse panel is ACC. This means if you are sitting listening to the radio, etc, the tach will be live. You CAN use that. Yes on the dimmer. Orange wiring coming off the INST fuse in the fuse panel.

 

[Dana67Dart]

Why not tap into IGN 1 to the ballast resister

 

[unclepunchy]

Thanks 67, looks like I could use any of these three for the ACC, correct?

 

[unclepunchy]

Why not tap into IGN 1 to the ballast resister

I have the ballast bypassed. Running HEI. I just finished taping/tubing everything up nice and pretty and don’t really want to take it all apart… yet.

 

[Dana67Dart]

I have the ballast bypassed. Running HEI

The wire that now feeds your HEI is the same wire ( most likely) but I agree you can use the output from the 3 ACC fuses. If you have an empty space you can get the connector and run a dedicated run to the tach maybe a 5 amp fuse and 18 awg wire.

But as noted by 67dart273 the tach will be live in run AND in ACC

 

[Mattax]

you can use the output from the 3 ACC fuses.

IIRC that's how Chrysler powered the tach on some years/models/.

 

[67Dart273]

I have the ballast bypassed. Running HEI. I just finished taping/tubing everything up nice and pretty and don’t really want to take it all apart… yet.

Since you had to run the ignition trigger into the tach, you could have run a (fused) wire off the coil + stud to power the tach

 

[Dana67Dart]

IIRC that's how Chrysler powered the tach on some years/models/.

This is 67 dart
Green goes to coil
Purple with trace is backup lights
Orange is inst cluster / back light / prndl lights and gets power from rheostat.
Black is ground
Yellow gets power from a post on the wiper switch. ( Switched or always on???)

I think this diagram has an error.

I think purple with that trace is the wire getting power from the wiper switch
And yellow is the output to the backup lights.

Making wire getting power from the wiper switch the power for the tach.

Note thec1234 on the left does not mirror the 1234 on the right.

The Solid purpleon the right goes to the actual backup light bulbs

The white in the right god to a terminal on the wiper switch. ( Note the wiper switch is NOT switching any power to the white wire it is just a jumper of sorts.)

 

[Mattax]

Dana.
In '67 the 18 ga dark blue with stripe wire from the optional fuse goes to the tach. At least for the Barracuda if had the optional tach.

The tach gets a signal from a gray wire in the harness. Lighting comes from the instrument panel lights.
The seperate tach in the console got lighting from an additional instrument panel lamp feed (orange) that was otherwise unused.

In '67 white from the Wiper Switch B terminal is power for the reverse. After that the connections vary.
I don't want to detrail this thread further since the OP has much newer model. But yes we agree power was tapped for the tach from the switched accessory fuses.

New wiring for our ‘67 B’cuda

The previous owner would have embarrassed the guys on Roadkill. Due to the number or cut wires, spliced in wires, disconnected wires and the general lack of color coding, I purchased new harnesses from M&H Electric Fabricators. Expensive, but damn nice… except … Why can’t they label their...

www.forabodiesonly.com

Wiper Motor Wires

I have a 2-speed switch on mine, came that way from the factory, with that motor. This is a 67 Valiant that I had, the other style motor with a 2 speed switch. Alan FWIW the date code on my white plate motor is 3326, late 1966. p/n 2822 963. Not sure what the other numbers are.

www.forabodiesonly.com

 

[Dana67Dart]

It is confusing when the factory used a terminal on a unrelated switch to provide power to other accessories





But I agree they changed a lot over the years but left other things alone. No ryhme or reason