1st Generation 1964 1/2 - 1973 - Questions & general discussions that apply to a specific year > 1969 Boss

69 Carb solenoid wiring

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Scott302:
Midlife,
So are you saying that the wire is a stand alone connection at the firewall and not part of any multi terminal firewall connection???
Regards,
Scott


--- Quote from: midlife on April 16, 2015, 10:48:43 PM ---In that case, they seemed to have used a large female bullet (green) with green wiring that normally would be for the AC compressor, but the wire itself was tied into the ignition.

--- End quote ---

J_Speegle:
Did look and test my 69 the other day when I was at the shop - It only had an unused (no solenoid wire hooked up to the engine yet) green wire and it was not energized when the key was in the on position

midlife:
Scott and Jeff:
I am going on memory of a wiring harness I did about 2-3 years ago, and only remember that it was a 69 Boss or Shelby.  What was strange was that it had all of the wiring for A/C, but one of the lines at the RHS of the harness that normally goes out through the firewall had no continuity.  I unwrapped the tape and found that wire cut under the tape.  I then traced the other end (from the firewall side) and found it tied into the ignition switch run-only lines.  Very very strange. 

I dug through my files and found it on a Boss 302 harness that I converted to tach.  In my correspondence to this customer, I made this note: "I asked on a concours Mustang forum about the B2 wiring, and they responded that there was a carb antistall dashpot function. " The date was July, 2013.  Here's that thread:

http://www.concoursmustang.com/forum/index.php?topic=6790.0

midlife:
OK...I have a customer who brought over at the Pensacola show a Boss 302 underdash harness that is early in production.  After looking at it, I said it was an AC car, but he said no Boss302 (except one for a Ford exec) had AC.  I then remembered that some Boss's used one of the AC lines that connects beyond the firewall that is tied into a RUN-only line coming from the ignition.  By happenstance, this customer was examining another Boss 302 and it had a green wire with a large female bullet connector coming out of the firewall, just like his. 

My suspicion is that this line is the primary power for the rev limiter, but have no documentation to prove that.  On the Boss2 being examined, power was taken from the + side of the coil by aftermarket wiring.

Nevertheless, I will be refurbishing this harness next weekend.  What, if any thing, would anyone like me to examine and/or prove regarding this unusual wiring on the underdash harness?  I am more than willing to take pictures and document whatever one wants.

midlife:
OK...finished refurbishing an early Boss 302 underdash harness.  What sticks out is that it is wired (almost) for AC.  The lead that goes out to the passenger compartment typically runs to the passenger side to hook up to a switch; instead, that line is cut and spliced with a factory OEM splice with the run-only line coming off of the ignition.  The AC connectors and lines are taped off to indicate that they aren't used.

While examining a Boss last week, it appears that the rev limiter needs run-only power to provide power to that unit.  I wonder if this green lead, normally for the AC clutch, is used for the rev limiter or for the carb solenoid.

Anyway, here's a picture of the OEM factory splice and the taped-up AC lines.

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