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Safety switch


The model 1c had a safety switch.  It's been around atleast since model c.

The switch makes it so the vacuum won't turn on unless nozzle or hose is in place.  

The 500 series 2 wires +,- from light, 2 +, - coil, ground power from carbon brushes. 

The all connect to the switch. 

The wiring is ran on the  outside of the vacuum from the switch underneath to the safety switch. 

If you went to the switch and didn't hook up safety switch wires it would turn on when you power on the vacuum.


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