Re: Wiring question

Posted by HH56 On 2021/8/3 9:39:57
The drawing you have is for the R9 overdrive and postwar Electromatic Clutch combination from the 48 wiring diagram. OD was used from 1940 thru early 48 production. Sometime during the production of the 22nd series they switched to the R11 OD which is a much simpler unit -- both electrically and mechanically. The postwar Electromatic clutch portion stayed the same. The R11 unit lasted in various forms until the end of Packard production.

To positively tell which unit you have look at the OD relay. The R9 relay is a fairly large squarish black box with 6 terminals. The R11 is a smaller rectangle with 4 terminals and a fuse mounted on the long side. From the photo you posted in your first question it is the R11. The same lockout switch and cable was used on both units but the switch is wired differently. Under the car, on the R9 the lockout cable is on the passenger side, the R11 has it on the drivers side.

The end crimp failing and allowing the cable to come out of the OD lockout assy is fairly common if the steel cable rusts or becomes stiff inside the coiled outer housing. Once the crimp on the end loosens or splits there appears to be no permanent way to recrimp or solder the split and still be strong enough to hold.

Freeing the cable will most likely take a soak in some penetrating fluid and then a good lube to get it sliding again. I removed the cable and coiled it up fairly tightly in a shallow container so as to open the spaces between the wire coils on the housing and allow penetrating fluid to get inside. Once the cable is free and relubed a relatively painless fix for the damaged crimp is to buy a couple of split collars and clamp them over the end. If you cannot find them at a hardware store McMaster has a good selection. Don't remember if it takes a 5/16 or 3/8 ID clamp so measure your diameter. The original crimped portion will only hold one clamp but on this assy, for a smoother look like it was more a part of the original assy I used a lathe to bore out a small area of a second clamp so it would slide farther up the damaged area to allow the room for a second clamp.

On the lockout switch and hanging wires, there is no telling what someone has done so best to just start tracing each wire to see where or what else has been removed or bypassed. It is also possible the lockout switch plunger had a groove worn in the end so it no longer made a reliable contact to complete the circuit to the OD. Someone may have tried to rig up another way to enable OD.

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jpeg  IMG_0139.jpeg (176.33 KB)
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jpg  R9_11 lockout sw.jpg (41.37 KB)
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