Author Topic: tach wiring '71 cuda ralley dash  (Read 885 times)

Offline Got JOB

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tach wiring '71 cuda ralley dash
« on: May 16, 2013 - 04:24:57 PM »
How is the tach wired  in the wiring harness? Where does it get 12 volts?
70 T/A Plum crazy
71 vert. viper red
74 Rallye triple black ( sold )
76 Aspen Wagon
West Georgia




Offline FY1Cuda

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Re: tach wiring '71 cuda ralley dash
« Reply #1 on: May 17, 2013 - 08:23:28 PM »
On a '70 (and probably a '71), the tach gets  the power from a blue wire that is tapped off of the radio plug.  The radio plug has two sides to it: one is for powering the radio and one is for the light on the face of the radio.  The blue tach wire is spliced off of the orange lighting side of the plug.

Offline Chryco Psycho

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Re: tach wiring '71 cuda ralley dash
« Reply #2 on: May 17, 2013 - 10:23:33 PM »
you sure , that would mean the only time the tach would have is is when the lights are on  :clueless:

Challenger - You`ll wish You Hadn`t

Offline JayBee

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Re: tach wiring '71 cuda ralley dash
« Reply #3 on: May 18, 2013 - 06:22:59 AM »
I just looked at my service manual's schematic at it shows the blue wire tapping off the radios red w/tracer wire (X12-18R*).
John

1970 Barracuda convertible
2014 Toyota Avalon

Offline FY1Cuda

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Re: tach wiring '71 cuda ralley dash
« Reply #4 on: May 20, 2013 - 05:52:08 PM »
I stand corrected.