ConcoursMustang Forums

1st Generation 1964 1/2 - 1973 - Questions & general discussions that apply to a specific year => 1967 Mustang => Topic started by: rocnhrse on December 22, 2020, 08:04:06 PM

Title: Grounding cable
Post by: rocnhrse on December 22, 2020, 08:04:06 PM

The grounding cable  at the back of right side of engine I thought  was screwed to the fire wall,and yet there is no evidence that it was done,any chance  it was grounded to one of the bolts that hold the blower  motor

Title: Re: Grounding cable
Post by: ruppstang on December 22, 2020, 08:07:20 PM

It was grounded to the firewall to the right of the blower motor.

Title: Re: Grounding cable
Post by: rocnhrse on December 22, 2020, 10:52:10 PM

Thanks  for the picture

Title: Re: Grounding cable
Post by: 196667Bob on December 23, 2020, 02:20:42 AM

Attached from the 1967 Electrical Assembly Manual.

Bob

Title: Re: Grounding cable
Post by: Bob Gaines on December 23, 2020, 02:28:15 AM

At the firewall it calls for a zinc dicromate locking washer for good ground connection and a sheet metal screw like used on the regulator or solenoid .I have seen them both silver and gold although I think that the assemblyline manual indicates gold.

Title: Re: Grounding cable
Post by: jwc66k on December 23, 2020, 12:46:40 PM

Gold zinc (its commonly used name here in the Hi-Tech Silicon Valley) was supposed to make a better electrical connection than clear zinc (another common phrase here), but that has been disputed by some electronic/electrical "experts". The use may be as simple as the use of red dye on bolts - to indicate something other than ordinary.
Jim

Title: Re: Grounding cable
Post by: 196667Bob on December 23, 2020, 02:09:03 PM

Bob G is correct. The Assembly Manual shows all 4 pieces of Hardware as having an S36 Finish - Zinc Plate and Dichromate.

I have attached details of the 4 pieces of Hardware from the Ford Standard and Utility Parts Catalog (except for the 34942 External Lock Washer which did not appear in any S&UPC from 1961 through 1975, but shows up in AMK's Guide to Ford Fasteners). Note that as the S&UPC's are Service Parts, all appear with either a Zinc, or Cad Finish. However, to be "Concourse (Assembly Line) Correct", all should be the Zinc-Dichromate Finish as previously noted.

Also of interest to those inquiring minds, yes, the 390's are shown to use the same attaching Hardware. The 6 Cylinder Engine used the most inboard Starter Motor Bolt on the "engine side", and on the "firewall (dash) side", the Assembly Manual does not detail what was used. However, I would guess that it's a "pretty good bet" that the same Hardware was used to attach the cable to the firewall as the V8's did.

Hope this helps.

Bob