Chrysler Repair: radiator fans, coolant temp, roland roland

Question
have a 1997 voyager 2.4 the radiator fans dont come on when the ac is on. and my car over heats also when not using ac. what part do i have to buy. replace coolant temp sensor still doesnt work can you help.

Answer
Hi Manuel,
Unfortunately I don't have the wiring diagrams for the '97 model year. If there are two separate fans, one high and one low speed, and neither of then works under a/c or not a/c conditions, then I believe that in all likelihood there is a fuse or a fusible link blown in the circuit that provides the current to operate the motors. I suspect that there may be what is called a power distribution center under the hood which is box containing fuses and relays. One of the fuses in that box will be a 40 amp or thereabout that provides the current. I would try to check fuses of that size range to see if you can find any that are blown. If there is not such a box, then the alternative is that there is a fusible link that has blown (which is a wire that behaves like a fuse; I know the '93 and earlier had that set up, I just don't know if the '97 had been modernized to have the box and large fuses instead of fusible links). So look under the hood and let me know what you find. If both the fans never work then I do believe it is not the fans, nor the coolant temp sensor, nor the engine controller, but rather the power supply for operating the fans. That power supply is the only circuit that controls the operation of both fans under both a/c and non a/c conditions. Everything else is involved in only one or the other fan so you would have to more than one thing fail to have it behaving the way it is (for example both fans burned out, which you could check by jumping 12V from the battery to each fan plug's multi-color wire and a ground wire from the fan's black wire to the - post of the battery. That will prove whether the fans themselves are individually o.k. or not).
I'd be interested to know what you find out.
Roland
Roland