How to identify a stdard dash harness from a Rallye?

[migsBIG]

So I was buying some 1970 seats and guy said I could have a dash harness he had a spare of. Had a hand written tag on it saying it was a non-ac Rallye dash harness for 1974 Cuda model. I plan on putting a 1972 Rallye dash gauges in my car I was gifted from my good friend WO. Is there a way to verify it is a rally harness or std? This tag was attached to the harness.

 

[Challenger RTA]

The lay out of the connetions amp,oil, temp and fuel will be grouped togeter for a ralley cluster.

 

[larry4406]

Presence /absence of a tach wire?

 

[Xcudame]

Real easy, three dash light bulb sockets for a standard harness and four for a rally harness. Orange wires. Can't miss it.

 

[Katfish]

Light harness is separate, independent of main harness.

 

[migsBIG]

thanks, will take a look at those connections. will post pics later.

 

[Katfish]

Easiest way would probably be the oil gauge connection.
Standard is idiot light (bulb)
Ralley will be the push on barrel (gauge)

 

[Vaanth]

So I was buying some 1970 seats and guy said I could have a dash harness he had a spare of. Had a hand written tag on it saying it was a non-ac Rallye dash harness for 1974 Cuda model. I plan on putting a 1972 Rallye dash gauges in my car I was gifted from my good friend WO. Is there a way to verify it is a rally harness or std? This tag was attached to the harness.

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The instrument cluster wiring portion branches from the main wrapped harness in the same area for both standard and Rallye clusters. From there, the Rallye cluster wiring is a little more involved. The following two images show a Rallye cluster wiring portion and a standard cluster wiring portion:

Rallye cluster wiring:

Standard cluster wiring:

If the standard cluster has the optional clock, it also has a small, separate, wire connected to the ammeter to power the clock as shown in the following image:

Key wiring differences between the two harness include the following:

• The Rallye wiring has the grey clock wire integrated into the harness. The standard cluster has a separate jumper as shown, if a clock is installed.
• The Rallye wiring has the grey/red and blue tachometer wires. The standard cluster does not have a tachometer.
• The Rallye wiring has the grey wire with a post plug for the oil pressure gauge. The standard wiring has a grey wire with a light socket for the oil warning light.
• The span of the wiring portion is wider with different positioning of terminal or socket ends for the Rallye cluster.

The pictured tag with number "3592 267" is from a 1973 or 1974 car.

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[migsBIG]

I took some pics.

 

[Vaanth]

I took some pics.

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The pictured wiring harness is for a 1974 E-body with a Rallye instrument cluster.

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