Go to: http://www.the12volt.com/installbay/stereodetail/929.html This site is correct, I used it in my '92 Tempo GL.
Go to: http://www.the12volt.com/installbay/stereodetail/928.html I used this site for my '92 Tempo GL, everything is correct.
Go to: http://www.the12volt.com/installbay/stereodetail/931.html I used the same exact diagram for my '92 Tempo GL, information is all correct!
Check the parking light fuse--should be the same circuit Could be burned out bulbs Could be bad light switch
It could have helped if you specified a year. Tempo was made from '84 to '94 and changed a considerable amount. Go to: http://www.the12volt.com/installbay/vehiclewiring/1/modeld/Ford.html Then look for your year and go over to the right side and click the "Stereo" link. Voila! this site is correct in it's info. I used it for my '92 Tempo GL.
The question you ask is too involved for a proper answer. You need to go to a car parts store, and get a repair manual for your car. They cost about $16.00
To tell how fast or slow the music should go. If the tempo is 120 thats 120 beats per minute.
As fast as a Chevy will tow it.
Not fast enough
It would be a good idea to pick up a Ford Tempo owners guide or repair manual to find the location. Not only that, but if there are future problems you'll be able to fix them considering the repair is not major. I know Ford Tempo thermostats go for about $15 bucks. http://www.93Tempo.Citymax.com