Topic: Grounding cable

[rocnhrse]

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

[ruppstang]

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

[rocnhrse]

Thanks  for the picture

[196667Bob]

Attached from the 1967 Electrical Assembly Manual.

Bob

[Bob Gaines]

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.

[jwc66k]

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

[196667Bob]

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