Bypassing the main power switch will only work if the main power switch is the problem.
It may not be!
There is an interlock switch actuated by the spindle lock mechanism(It actually is still available! Cost $25-30 with S & H). Also as I recall the multi conductor wire to the handle was problematic as well.
Then there is also the variable speed control that can cause the same problem.
I would want to troubleshoot and find the actual problem before attempting repair. Jumpering things without an understanding of what you are doing usually doesn't end well!
Also do consider that is about a 30-35 year old, or so, tool. I think I would just replace the tool.
I have found that hand tools are the best choice when I want to make mistakes at a slower rate of speed.
I don't suffer from insanity. I enjoy every minute of it.
Last edited by Dmeadows; 06-24-2014 at 08:49 AM.