Blackout light switch

[Fletcher76]

Is there a way to bench test or test one of these switches to verify it’s working? If not is there a way to rebuild the switch? It’s a D.C. Electronics switch
My part# is DC2750
MS51113-1

 

[NDT]

That switch has been the same since it's introduction in 1950, still being made now by various mfgrs. With a multimeter you can verify continuity between pins as you move the selectors. Other than that it is not exactly serviceable. DC Electronics is not one of the better mfgrs of it.

 

[G744]

In the early 50's tactical lighting switches made by Bendix had TWO receptacles, one for the truck's lighting, the other for the trailer connections via a separate loom to the NATO 12-wire receptacle.

Conelrad

 

[Fletcher76]

That switch has been the same since it's introduction in 1950, still being made now by various mfgrs. With a multimeter you can verify continuity between pins as you move the selectors. Other than that it is not exactly serviceable. DC Electronics is not one of the better mfgrs of it.

I figured it’s trash but I was holding out hope of it being repairable. My unlock switch doesn’t move and the top switch b.o. drive to service drive doesn’t seem to grab any modes while it moves.

 

[msgjd]

The field-expedient way to test those switches is to have a known good one on hand.. Plug in the good one and see what changes

 

[155mm]

this thread has the pin out, you can check continuity from pin F which is power in to which ever circuit you are having trouble with.

3 lever light switch mod to push/pull switches

Purist read no further, and hateful commenter about inability to operate a 3 lever light switch keep your comments to yourself, i did read the other post I consider these switches unreliable, they fail like this one did at the most inopportune times, flashers power, button C melted into plastic...

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