The switch change is pretty simple. There's a spring-loaded button in the center of the switch assembly. Pull the old switch to the "on" position, press the button, and pull the knob and shaft out of the dash. Then you can insert a big flat-blade screwdriver into the slot in the nut holding the switch into the dash and remove it. Swap the wires to the new switch- - - -they're probably made into an idiot-proof plug so there's no way to mix them up. There should be a raised tab that fits into a slot in the backside of the dash to keep the switch from turning as you tighten the nut. Push the shaft into the new switch. It will click into place without having to press the button. You're done!

On the tail light/turn signal issue, it sounds like you're dealing with a bad ground at the light socket. Take a wire attached with vise grips to a known good ground, like a bare, shiny spot on the frame, and touch the other end to the brass base of the bulb with it installed in the socket. If that makes everything work right, thoroughly clean the bulb socket with a wire brush,(A brass 12 gauge shotgun cleaning brush in an electric drill motor works great!) and possibly add a ground wire from the tail light assembly back to the frame.
Jerry

Last edited by Hotrod Lincoln; 08/10/2008 3:51 PM.

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