68 XR7 Ignition wiring issue

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Yorgle
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Re: 68 XR7 Ignition wiring issue

#11

Post by Yorgle » 07 Oct 2019, 06:52

If my memory is correct, one of the wires is the pink resistor wire and the other is red/green. The pink wire changes to another color at some point but ultimately connects to the + side of the coil. I think the red wire comes from the ignition switch. Someone with a wiring diagram handy can please confirm this.
1968 XR-7 Augusta Green, J-Code, 5 litre, Autolite 6100, 5 spd, convertible with heated seats, cruise control and rear sway bar.

BTW, I think electronic ignition is pointless.

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Czechmate68
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Re: 68 XR7 Ignition wiring issue

#12

Post by Czechmate68 » 07 Oct 2019, 21:42

Royce wrote:
06 Oct 2019, 09:29
Like Yorgie said - Just plug those two wires into each other and the car will operate without the tach.

Czechmate68 wrote:
05 Oct 2019, 23:17
I checked and my wires are correct. I haven't connected the two for the tech yet but will report back when I do.
Can you assist with the colors of those two wires on the cluster run? My gauges are packed away and it has been a long time since I removed them.

Thanks much!
Brian

CCOA# 10035
Ride: 1968 XR7 302 2V - undergoing refresh

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Czechmate68
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Re: 68 XR7 Ignition wiring issue

#13

Post by Czechmate68 » 07 Oct 2019, 23:27

Yorgle wrote:
07 Oct 2019, 06:52
If my memory is correct, one of the wires is the pink resistor wire and the other is red/green. The pink wire changes to another color at some point but ultimately connects to the + side of the coil. I think the red wire comes from the ignition switch. Someone with a wiring diagram handy can please confirm this.
I found this:

What Randy said. Here's the Ford 'diagram' of a factory tach installation



Not shown but important: The wire between the tachometer and the coil includes the 'pink' resistor wire. The OEM tach will not function correctly w/o a
Brian

CCOA# 10035
Ride: 1968 XR7 302 2V - undergoing refresh

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Czechmate68
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Re: 68 XR7 Ignition wiring issue

#14

Post by Czechmate68 » 07 Oct 2019, 23:32

I guess the pink wire with a red connector attaches to the Black wire from the tac to go to the coil +.
So then the red wire from the tac would go to a black wire?? I found the pink one but not the other.
Brian

CCOA# 10035
Ride: 1968 XR7 302 2V - undergoing refresh

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Yorgle
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Re: 68 XR7 Ignition wiring issue

#15

Post by Yorgle » 08 Oct 2019, 06:23

I believe that’s correct- black wire from the tach (which should have a female plug end) goes to the coil through the pink resistor wire which should have a male plug. Look for a red/green wire from the ignition switch harness that has a female plug- it should be hot when the key is in the start and run position- as I recall it's fairly short and it’s probably hiding somewhere behind the ashtray.
1968 XR-7 Augusta Green, J-Code, 5 litre, Autolite 6100, 5 spd, convertible with heated seats, cruise control and rear sway bar.

BTW, I think electronic ignition is pointless.

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Czechmate68
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Re: 68 XR7 Ignition wiring issue

#16

Post by Czechmate68 » 08 Oct 2019, 21:11

Yorgie, just when I think I making progress I got a wall! The above diagram shows the Black wire from the tac with a male connection. My tech black wire is female and about 3" long. The pink resister wire has a male connector but had a 3" tail connector that is a red wire with both m/ f connections, to bridge I guess. But why would they have a red wire bridge between the pink and black wire?
Also, the wire connected on my coil + is red/silver, not pink. The pink wire runs into a look on the left side of the wiper motor, not the ignition switch loom.
I did find a red/silver wire paired with a red/yellow wire with a female connector. That red/silver wire is the same as I have coming out of that 3 wire group in the firewall to the coil area. Is that correct? If so I don't know where the pink wire even goes unless it changes color at another connection i can't see.
Ugg!

Thanks again,
Brian

CCOA# 10035
Ride: 1968 XR7 302 2V - undergoing refresh

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Czechmate68
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Re: 68 XR7 Ignition wiring issue

#17

Post by Czechmate68 » 08 Oct 2019, 21:57

Alright, quick update. Mystery solved. Found this basic video which shows how the pink wire connects to the tech and the run of two red/green (I said silver) connect to the tech and how to bypass the tech to start without your tach. Please let me know if the link I copied and pasted works for you.

WCCC shows a red connector in front of the pink wire in the photo for their replacement harness.

https://www.google.com/search?q=photo+o ... dn0ifGgtaM:

Much thanks,
Brian

CCOA# 10035
Ride: 1968 XR7 302 2V - undergoing refresh

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Yorgle
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Re: 68 XR7 Ignition wiring issue

#18

Post by Yorgle » 08 Oct 2019, 22:29

The harness in the video is obviously for a mustang but that’s the concept. Sounds like you have the resistor wire. Now just hunt down the other wire. I believe it’s the only single prong female plug in that area of the dash.
1968 XR-7 Augusta Green, J-Code, 5 litre, Autolite 6100, 5 spd, convertible with heated seats, cruise control and rear sway bar.

BTW, I think electronic ignition is pointless.

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Czechmate68
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Re: 68 XR7 Ignition wiring issue

#19

Post by Czechmate68 » 09 Oct 2019, 22:45

Yes, agreed but I found through my research that the tech wiring in our Cougars is the same as the Shelby so it was helpful. What was important to me from the video is that red wire I was looking for had a second red wire with it and they both run into the same female plug! I was looking for a single red/green wire with a female plug so learned something new again. Anyways I easily found that so all is well to get those two connected to fire up this weekend. Also, it was good to know the pink wire has a solid red short connector on the end and that it eventually ends up changing back to the red/green which is the color when it actually attached to the coil +.
Thanks for you patience as this is my first rebuild.

I plan to attach a few photos on this thread for the next guy that needs the info.
Brian

CCOA# 10035
Ride: 1968 XR7 302 2V - undergoing refresh

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