Ground wires attachment point

[lopena]

Car is a 1969 911S. There are three brown ground wires in the engine compartment near the CDI Box. I realize ground wires can be connected to any good grounding point but what is the correct factory mounting point for these three wires?

Many thanks as always,
Alan
N.J.

[edmayo]

They all attach to the 8mm ground stud.

[Richy]

I think the stud is in front of the CD unit . ( towards the front of the car )

[freddegabbe]

This is how it looks in my very early -69 S.

[lopena]

Thank you Ed, Fredrik and Richy!

I used my phone camera to survey the area and found the grounding stud between the fuel filter and the CDI box on my March, 1969 911S.

Alan
N.J.

[edmayo]

how long have they been off?

[lopena]

how long have they been off?

Ed:

The engine was dropped last year to complete a full-body restoration. That’s probably when they were disconnected.

Since then, the car has only been driven about 50 miles and runs very well (in spite of the disconnected ground wires!).

I haven’t yet checked whether brake lights, rear window defroster, etc. are all working. Those ground wires must be connected to something!

Alan
N.J.

[edmayo]

those are grounds for relay board, cold start solenoid, rear defrost and license lights.

[lopena]

those are grounds for relay board, cold start solenoid, rear defrost and license lights.

Okay...that makes sense since I haven’t used the rear defrost or cold start solenoid, nor have I checked the license plate lights...but wouldn’t having the relay board ground disconnected cause some sort of a problem? Unless, of course, there’s an alternate ground...like the mounting bolts, for example.

Alan
N.J.

[edmayo]

It could if your CD box was on the relay board, but it is on metal brackets.