F15a wiring harness

[Dave Schindel]

I took more pics and measured the length at about 2m..I can't pick this harness out of the F15a wiring diagram so I don't think it is a CMP harness.The side pins on the connector are the same height and the only two ends missing from the pictures are broken off. Nice heavy duty connector though.

[Bob Carriere]

They are still available from some restoration shops in California.

On the cab 11 /12 they are similar for connecting the headlight buckets....BUT..... they are set up for 3 wires....... and the 3 wires style are no longer made. They are basically a Ford design copied on Model T headlights

They are available moulded in plastic or machined in steel. The male rubber parts fits right in the bottom section of the headlight buckets at (RH)5 and (LH) 7 o'clock and the pins holds them in place. The head light needs 3 contacts one for hi beams, low beams and the internal marker light.

IMHO the harness seems to be intended for a trailer with dual filament bulbs.

Cheers

[hrpearce]

Looks like the end you would need to plug a trouble light into the dash socket.

[Tony Smith]

Looks like the fitting for the rubber taillights on UK/Canadian Carriers. Although a single filament bulb, the Carriers don't earth back through the hull, each lighting circuit runs back to the dash.

[rob love]

The design Branch records show this type connector on the trailers larger than 10cwt. The small trailers use the US style connector, whereas the larger trailers have this plug. Perhaps the length of the harness would indicate the type of trailer.
I would have to look at some of my trailers (once it warms up) to see if there is a red/white switch or a convoy lamp switch for the lighting which would explain the connections in the middle of the harness.

Hard to believe they would not run a ground. Depending on the hitch, especially with the impact type drawbars, for ground is not ideal.

[Dave Schindel]

Ok, Rob, I think you are correct. The few trailer parts I have are obviously for a heavy trailer. my searching has not turned up any photos of similar trailers, but this one used the same rims as CMPs as well as brakes, brake master cyl. and suspension(15cwt or more). Sometime I would like to see your trailers to try identify what I have.
Thanks to everyone who replied.
Dave