My reverse lights haven't been working since i got the car. Already replaced bulbs, no luck. I have an extra s54 that i can take a switch out of, just need to know what size socket i have to buy

Measuring tape?

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Or a tool set and see which one fits

My best guess would be that you need a deep 17mm socket.
Most things are 10, 12, 14, or 17mm

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No its at least 22mm. maybe bigger.
my biggest sockets wont fit (19mm and 15/16)

Could be 22mm, as that was the size for the fill plug if I recall correctly.

the drain plug on my s54 is a 15/16", which is 24 mm. I went to Sears just to find a 6 point box end to be sure I don't round off my new drain and fill plugs

http://extension.missouri.edu/webster/wrench-chart.aspx

anything bigger is usually the 31mm(or is it 32?) like is used for the spark plug tubes, oil cooler, and axle hub me thinks.

Okay, ive taken off both the fill and drain plug on my transmission. Not the same size as reverse switch.

I have all socket sizes from 3mm up til 19mm and 15/16. NONE of them fit.
i also have a 30mm axle nut socket and its too big.

so its gotta be between 20 and 29mm.

This post has been edited by Arturio55: Mar 11, 2015 - 12:02 AM