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Help with Vintage Variable Speed Bosch Drill

Lesserstore

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Mar 18, 2020
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864
Location
Texas
I posted this last week in the vintage tool discussion and haven't gotten any replies, and think I should have posted it in the general tool discussion.

I bought this Bosch Scintilla model 1117 2 speed VS drill for $10 Thursday, and according to a date code list I found, 935 correlates to Q3 1979. The drill works, but the trigger doesn't increase the speed as you pull it, it's only off or full speed. A catalog from 1976 gave the speeds as 800 and 0-1600 so I thought it was just because I had it on the slow speed, but even on high it still wasn't varying the speed. The switch is made in Holland by Capax, who I've found zilch on. I think it has had a new cord put on it so I thought the PO may have put a wire into the wrong hole as there was an empty space in the bottom middle of the switch. Tried that and the drill functioned the same. There are no missing or cut wires in the drill, so what else could be causing it to not be variable speed?
 

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The Cobbler

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looks to me like maybe the wires are mixed up with the way the terminals have paint on them. what does the terminal look like at the other wore coming from the motor ?
perhaps the switch is boogered too.

I'd be pulling off all the wires ( keep track where they went) and get a meter to see of you can figure anything out
 
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