Toggle switches

[Jacques Reed]

Hi Marty,

Here is a diagram I made up last year for the Ford light switch panel which may be of help showing the actual connections at the switches similar to Jordan's but for Ford's using their colour codes and wire numbers.

Thought I had posted it in Snakes Alive but apparently not. For Ford people, all lengths and positions were derived from an original harness and switches.

Cheers,

[M.Morren]

Hi,

I did not understand how the TPST switches operated because mine were wired the wrong way. The power was plugged into the top output pole. I did some checking and found out that the input poles are on the left instead of the right side. That's why I at first did not understand the drawings I fount on this forum.
I made a schematic of the inner workings of the switch so that anyone with the same problem as me can understand the workings of these switches.

Cheers!

[Jacques Reed]

Hi Marty.

Like your sketch, I modified my drawing to make it a bit clearer showing the internal common connections at the input side of the switches.

This may help others to trace where the current flows.

I have also copied it to the Snakes Alive thread.

Cheers,[ATTACH]Attachment 111526[/ATTACH]

[Jacques Reed]

Good Day,

I stuffed up! Just checked a NOS toggle switch and my drawing was incorrect on the input side showing the common input terminals.

Only the top and middle are common. There is no terminal in the bottom hole and I confirmed no continuity with the rivet in that hole. See photo.

Drawing revised.

Since posting this I have found a couple of other type switches used on the Ford instrument panel.

Here is a summary:

C29Q-13239 TPST- 2 x inputs, 3 x output terminals. 3 required according to parts manual for tail, side, and head lights. (first photo)
C39Q-10999-A SPST- 2 x inputs, 1 x output terminal. Can be us used for Dash, Tail, and Stop lamp Isolation. (second photo)
C39Q-10999-C DPST- 1 x input, 2 x output terminal. Marked "INST" and "IGN" on body. Can be used for ignition, and dash lights (third photo)

Now before anyone worries about finding all the different types, the TPST type can be used anywhere.

Obviously during the war the design evolved to perhaps cut down types of switches held in inventory.

I have added another light switch wiring diagram to "Snakes Alive". This was derived from another original light switch assembly which used 3 x SPST switches and just 2 TPST switches.


Cheers,