wiring diagram blower motor

Hi, I'm looking for a wiring diagram for blower motor for a 1987 t-bird. The problem I'm having is the blower motor only works on high. I have replaced the switch, but that did nothing. If anyone has any ideas?? Thanks

Welcome to the forum Jeannec42. There is a resistor bank that the switch connects to that is your likely problem. I don't have a diagram so you can check at your local library to see if they have a Mitchell electrical manual for your year Tbird or try the Autozone website. Autozone has some diagrams listed on their site or buy a repair manual. Good luck.