Chrysler Repair: rad fans not kicking in, fuse box, cv joint

Question
Hi,

My town and country was rear ended recently and it in turn rear ended the car in front, resulting in cracked front bumper and a cracked radiator, losing all the antifreeze. I brought it home and repaired the radiator and reinstalled with new antifreeze, no leaks. Car starts fine but the fan is not kicking in. I tested the fan and all three relays and fuses and they all checked out. I understand there is a fourth relay hidden somewhere that I can't locate. Where is it and what other TS possibilities are involved?

Also, I just put in a new transmission but when I hit the gas, the car vibrates in first and second gear, and smoothens out by the 4th or OD. Could it be the CV joint. I did bend it a lot to get it out of the wheel bearing.

Answer
The last controller is the PCM. The computer behind the left headlight. Check the lower connector on pin 75 (light green with a dark blue stripe)for continuity between the plug and fan relay. The relay in the underhood fuse box is temp controlled, while the other 2 are low and high speed for the a/c system. To find out if the fan itself may be the problem, run the engine and have the heating system on full heat, full defrost. The a/c compressor should cut in and the fan starts. If it doesn't. it might be the fan motor or the connection.