Ok, my 71 Grabber wore out another turn signal switch, only took me 20years on this one...Anyway, if you know how hard it is to find one for a 71, you know what a pain it is finding one. I "thought" I found one on E-Bay, seller claimed it to be the "D2" one that fits 70-72. I bought it, and it what was hand written on the box, the 1972 revised number, the switch really had a D0 tag on it. The only real difference I see is there is no wire for the key buzzer. So, I plugged it in, and it works, I now have my left turn, and left brake light again, until I turn on the headlights. Then the LS brake light is on and the LF signal is on (steady) Whenever I have bought switches in the past, they did not come with the connector installed, this one did, I think there is a wire in the wrong spot. So, if anyone can help me with a wire diagram, it would help.
I think 71-up is the same as a Mustang. Try Autokrafters. $7 turn signal switch? Holy crap I'll take a dozen!
Here is a super web page with most wiring diagrams - should be what you are looking for. http://www.maverickcomet.com/Wiring/Maverick.asp Good Luck, Eric