Reference: C15 s/n 2842129988 history and restoration

[Phil Waterman]

The topic of reproducing wiring harnesses has come up several times before, so I would start by searching the Forum using a couple of terms, wiring, harness, wire loom. That should bring up most of the previous discussions and many good points. I’ve reproduced wiring harness on all three of my CMPs in each case using the old harness as the guide. I’ve save all the originals for future reference. With in the next few weeks I will be helping another member our little band of CMPers to make up a new harness for his C15A so I’ll be glad to try and supply any information that I can. While I’m doing that I can give you all the lengths color code information for the wiring.

Now from what you said-

“Now I have the engine running nicely on a temporary set up I am now about to sort the wiring loom proper, to do this I need to make a pattern but need to know the route the loom takes to various components to enable accurate lengths to be worked out.
Can anyone give me a rough guide to this please. By the way its a Cab 13 15cwt GS CMP 1942.”

-a couple of points or questions. From your question about the routing, I would assume that the original harness was missing or so chopped up that you cannot use that as a guide to the location. If this is the case I’d suggest that from photographs determine the routing and lay in a ½ or ¾ rope too check the route and to mark off the branch locations.

If you working from an original harness that you make all of your branch sections as well as the terminal ends 2-4 inches longer than the original this will aid greatly installation and later service. (particularly the section going off behind the dash)

From the 1942 date of your C15 that it has the commercial instruments instead of the later round military, this is important because there are several differences in the wire lengths and layout behind the dash.

Comparing the wiring harness part numbers from C60 to the HUP it appears that the harness are in general the same for front section which ends under the back wall of the cab so you can use wire routing and location information from the larger trucks.

The picture link below is of my original 1945 HUP harness on pin board, this is what I use for making up new harnesses. I also have 1942 C60S and 1941 C60L laid out this way. I’m trying to figure out how to photograph them so that it can be printed out full size.

http://www.mapleleafup.org/forums/at...=&postid=52124