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Author Topic:   Factory Tach Wiring
Pete Simpson
Journeyman

Posts: 2
From: Goderich Ont. Canada
Registered: Dec 2001

posted 12-26-2001 11:16 AM     Click Here to See the Profile for Pete Simpson   Click Here to Email Pete Simpson     Edit/Delete Message   Reply w/Quote
Just finished restoration of my 68 Cougar XR7G. Wiring harness was damaged by a previous engine bay fire, it was restored as best as possible, Now it is back in car the plugs to the factory Tach don't seem to be there. Anyone out there know the color code from the tach to the engine, as the shop manuel does not show XR7 schematics? Any help on this would be appreciated. Thanks

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SteveLaRiviere
Administrator

Posts: 44935
From: Saco, Maine
Registered: May 99

posted 12-26-2001 08:01 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
I don't have any '68 wiring schematics, but I'll put this post in the Cougar forum too, in case someone there can help you.

Welcome to M&M.

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kwazykat
Moderator

Posts: 7456
From: ...a wonderful place to be.... orange county... NC!!!! M&M member #92 .... a blue-oval GRRL-deluxe.....
Registered: Jun 99

posted 12-27-2001 12:12 PM     Click Here to See the Profile for kwazykat   Click Here to Email kwazykat     Edit/Delete Message   Reply w/Quote
hi pete!

here ya go!

https://mustangsandmore.com/ubb/Forum5/HTML/000225.html


kaylin

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blown 351
Journeyman

Posts: 68
From: Seattle, Wa. 98258
Registered: Dec 2001

posted 12-27-2001 03:54 PM     Click Here to See the Profile for blown 351   Click Here to Email blown 351     Edit/Delete Message   Reply w/Quote
The 2 wires that emerge from the back of the tach instrument are wired in series with the larger than usual PINK wire. This pink wire is the ignition resistor wire and cannot be replaced with a non-resistor type wire. The electrical current which flows through the primary ignition is sensed by the tach and the instrument needle responds accordingly.

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