I'm helping a friend with his 94 5.0 which has been overheating. We replaced the thermo, & radiator cap which seemed to help. The problem is now that the 2 speed electric cooling fan never comes on even when the car gets hot. I heard that there's a recall that has something to do with the fan. I jumped the fan to the battery & it works great. My question is, what should we do next? Is it possible that the head temp sensor is bad? I was considering just buying an adjustable thermo switch & placing it in the radiator then wiring it to CCRM so the fan comes on at the right temp. Correct me if I'm wrong, but the green & purple wire (#17) just controls the fans high speed setting. How can I access the low speed setting?