The question i have is reguarding the fan circuit. The previous owner of the car cut out the fan control sensor from the circuit and spliced in a fan on off switch in the cabin. I reciently removed that setup and bought a new control sensor and set it up as it was shown in the wireing diagrams. Now when i run the car the fan does not turn on. With the other setup i could flip the switch and turn the fan on so i know the fan works. I ohmed out all my cables so i know i have good contact. I also checked the voltages and the positive side of the fan is recieveing 12 volts. now when i connect in the fan control sensor nothing happens. The engine will heat up and the fan will not come on. At what temp should that fan come on? Does anyone have any ideas about why that would not turn on when the temp came up? I reciently found that my radiator cap is back would that cause the problem? I am drawing a troubleshooting blank here help or suggestions welcomed.

The fan doesn't come on until around 190+ degrees. It should not come on when you first start the car.

check the ground to the fan switch..!!!!

Check the thermostatic switch located in the bottom of radiator. You can check to see if it is working by attaching a continuity tester to the wires and putting it in a pan of water and bring water to boil. Continuity should be established when internal switch closes around 190 to 210 degrees.
Also check temperature relay on top of motor between number three and four spark plugs.
I had the same problem and found out my thermostat was stuck open, causing very slow temperature rise. It took a long time for engine to reach temperature high enough to turn fan on.