[dmjlambert]

You don't need to pull the dash for headlight switch. Just reach up in there and press the knob release, pull knob off, and unscrew the nut that holds it, and remove it from behind the dash. Since you changed it once, you probably already know the knob release button usually takes some finesse to convince it to release.

Then look at it and compare with your old one.

You can use a multimeter to test when the switch is in the various positions you get continuity on the right terminals. Search the forum here for info about which terminal is for which function, and ask questions and show pictures if you get stuck.