by harold » Thu Feb 02, 2012 6:12 am
The switch connects the bulb to ground. It sounds like you may have a short in the wire between the bulb and switch. Disconnect the wire from the screw on the end of the switch while in gear, and see what happens. If it still glows, you have a short. If it goes out, but glows when reconnected, you may need to shim the switch out with a very thin washer. Lossen it a turn, and if it then goes out, you need to shim. If you shim too much, it won't work at all.
If it glows after a turn, your switch is bad.