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what is this wire for?
#1
http://s1127.photobucket.com/albums/l624...1_0193.jpg

Bottom left of the pic, wire coming out off the top left of the firewall that is hanging straight down.

Hood light possibly?

"Do it once, do it right!"
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#2
Mike, if no one else answers then I'll look tomorrow.

Steve



[Image: 25yvyp3.jpg]
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#3
My 73 does not have it. Mine does not have air conditioning so I'm thinking it's for air conditioning, but not sure. The hood light runs across the top of the passenger side shock tower brace.



Mike AKA Ole Pony & Rare Pony

Our current Mustang garage/driveway
1973 Mustang Convert - Bought in 1974 - Still have it!
2004 Mach 1 Oxford White Auto, Bought Sept 06


[Image: 20180127_082009.jpg]

upload a photo on internet




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#4
You are talking about the one that hangs from the top of the firewall and has a connector on the end?

'Mike'
73 Convertible - 351C/4V CC heads/4bolt/forged flat tops/comp 270/rhodes/mallory unilite/tri-power/hookers/glasspacks/c6/3.50 limited slip/Gear Vendors/Global West sub frames, strut rods and shelby style traction bars/ Rear sway bar/tilt steering (not original)

Pics of modifications included in:
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#5
Well looks like I'm no help. Mine is cut.

[Image: 73mach-Showing%20-cutwire.jpg]

1965 D Code
[Image: 64-dcode-200x83.jpg]
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#6
It's either for the tach or for the alternator/guage option. I remember when I swapped in the guage package 20 years ago I had to pull it from the one car and put it in the other.
looking at my old wiring diagrams I am pretty sure it is for the charging circuit when you have an amp meter. It goes to the amp guage inside and has a connector as part of the charging circuit in the engine bay side.

'Mike'
73 Convertible - 351C/4V CC heads/4bolt/forged flat tops/comp 270/rhodes/mallory unilite/tri-power/hookers/glasspacks/c6/3.50 limited slip/Gear Vendors/Global West sub frames, strut rods and shelby style traction bars/ Rear sway bar/tilt steering (not original)

Pics of modifications included in:
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#7
I would guess it's for the EGR cutout solenoid. It's a small vac solenoid that mounts to the right rear of the intake and controls vacumn to the EGR valve, via the EGR control module (if I guessed right and read the schematic correctly). I replaced my intake and ditched the EGR valve, but still have the original pieces, and that looks like where it goes.

Steve
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#8
This question and picture would have made a great weekly fun question!



Mike AKA Ole Pony & Rare Pony

Our current Mustang garage/driveway
1973 Mustang Convert - Bought in 1974 - Still have it!
2004 Mach 1 Oxford White Auto, Bought Sept 06


[Image: 20180127_082009.jpg]

upload a photo on internet




  Reply
#9
what color is the wire?

'Mike'
73 Convertible - 351C/4V CC heads/4bolt/forged flat tops/comp 270/rhodes/mallory unilite/tri-power/hookers/glasspacks/c6/3.50 limited slip/Gear Vendors/Global West sub frames, strut rods and shelby style traction bars/ Rear sway bar/tilt steering (not original)

Pics of modifications included in:
  Reply
#10
Not sure if this will help, but I labeled mine "wiring harness". It's black, fused to a black wire with red/pink stripe.


.jpg   Wire from firewall.JPG (Size: 68.07 KB / Downloads: 117)

Doc

[Image: 6y14ea.jpg]

Project started 8-7-10
Completed: All new suspension, rebuilt 351C H Code bored .030 over with mild cam and intake, new 3.50 TracLok, custom exhaust system
Current "mini-project": interior upgrade Undecided
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