Vacuum FD light won't come on... why not? (1 Viewer)

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Is there any adjustment to make the transfer case switch to better sense the detent ball making the FD light come on?

I verified I have a detent ball. My light will illuminate when I test it removed from the transfer case by depressing the spring mechanism. I know 4WD engages because I can verify at the driveshaft but nothing I do turns the light on when switch is installed. I verify 12v at the switch.

My guess is the switch isn't being depressed enough by the detent ball. Any way to fix this? Or adjust it?

By chance, does anyone have a diameter measurement for the detent ball so I can verify the one I have is correct?
 

ToyotaMatt

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is this you switch in question ?

1604473127696.png
 

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