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1971 Road Runner tachometer wiring question

Posted By: SKR8PN

1971 Road Runner tachometer wiring question - 09/07/19 04:35 PM

I am in the process of completely rewiring a 1971 Road Runner using an American Auto-wire harness kit. I have found a few issues with the kit but mostly, in the wiring schematics they provide but so far have been able to work around them by using other schematics to piece together the puzzle. HOWEVER........I have not been able to locate any schematics that show the tach wiring for the rallye cluster. I know one of the wires is from the neg side of the coil, but what is the other one for and which one is which?? This is just the way I found the wiring and is one of the main reasons for the rewire.

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Posted By: T2R9

Re: 1971 Road Runner tachometer wiring question - 09/07/19 05:15 PM

The dark blue on top is ACC 12v feed and the lower one is the tach feed to the coil.



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Posted By: SKR8PN

Re: 1971 Road Runner tachometer wiring question - 09/07/19 05:36 PM

THANKS!!! Where did you find that schematic?
Posted By: T2R9

Re: 1971 Road Runner tachometer wiring question - 09/07/19 07:09 PM

Factory service manual. PDF copies can be downloaded here.

http://www.mymopar.com/index.php?pid=27
Posted By: SKR8PN

Re: 1971 Road Runner tachometer wiring question - 09/08/19 07:51 PM

I have that page(S) bookmarks and checked them before posting. It only shows me two schematics for the 1971 GTX, Road Runner etc. (sheet A and B) and neither one of them shows the tach wiring for a rallye cluster. What am I missing???
Posted By: bee1971

Re: 1971 Road Runner tachometer wiring question - 09/09/19 01:00 AM

That's because its not there


Its in the 1971 Plymouth Chassis Service Manual = Click on link

http://www.mymopar.com/index.php?pid=109

Its a huge download - Page 398 is the Tachometer Wiring Diagram For Rallye Dash Satellite Roadrunner GTX

8-177 under Electrical - Figure 22
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