The Snakes Alive CMP Wiring Project

[Mike K]

Originally Posted by m606paz

Hi Jaques
Thanks for the explanation, it has been very useful and a learning class for me.

So....
It's getting hard to get the right solenoid to work with the positive ground. All the ones I get here are postwar with negative ground.
Now, on the late electrical circuit data plate, it indicates that vehicles destined for India were negative grounded. What changes do I have to make to make it work with Negative Ground? Is it only to change the polarity of the battery and the instruments and electrical elements do not need changes? Only the solenoid is changed according to...?

Regards

Hi Mariano

The generator polarity needs to be changed if you are changing the battery terminals over.

The field coils in the generator are wound around iron cores, the cores have a small amount of residual magnetism in them that controls the polarity of the coils. It is easy to change the residual magnetism by quickly connecting a battery through the coils, it only takes a fraction of a second , the iron cores re-establish themselves with the opposite polarity .

[m606paz]

Thank you Mike for your valuable comment. I'll keep that in mind if I don't find the right solenoid.

[m606paz]

Before disassembling the harness, I leave photos and details of the part numbers of each switch

[m606paz]

Ford #11652-D harness betwin fuel switch and main harness

[m606paz]

C39Q-14403 Harness

[m606paz]

More 14403 Harness pics

[Bob Phillips]

I know this is a long shot but perhaps one of our informed readership could look at the attached photos and provide an opinion. This harness is about 16 feet long, has black cloth covering full length. It has three major features to it, the front portion with three sections of terminals... all of which are round holed tab type terminals, not spade terminals or plug in types.
Middle part has a couple of larger heavy duty style terminals.. and a single wire that splits off and is quite long.
And the rear section which has several connections of the plug in type terminal, and splits off to a multi terminal bit and then a longer two wire extension with bare wires ends.

While I hope its CMP I suspect it is not. It does not have many of the plug in terminals such as in the immediately previous post, except at the rear portion. It also seems too long unless it was for a long wheelbase truck. Any questions or thoughts on application? Maybe I have the orientation wrong?

harness1.jpg harness2.jpg harness3.jpg harness4.jpg harness5.jpg