kickdown relay
 

I have a 1987 300TD which I am trying to restore. The car works very well and can get up to 90 mph. However, the airconditioning packed up on me and the tach also went. It seems that my kickdown relay is faulty and burned out my over voltage protector (?) and the airconditioner relay. Any idea where I can get these at a good price? Also, my ABS light on the dash is on even though I just installed new sensors. Is it connected with the OVP?
I don't know anything about engines but I love the car. Everything else is working well- moonroof, electronic windows etc.