1998 Plymouth Breeze

I have a 98, 2.4 as well. I had some overheating issues, my drivers side fan stopped from a bad motor. What I can tell you from research... both fans are designed to run at the same time, no matter what. They both run at the same speed, there is low and high speeds, but they both would run the same, not one is the low, and the other is the high. Both the same motor, so both have the same capability. One down will def pose overheat issues. I would look at the underhood fuse box. Check all you fuses that would pertain, and possibly replace the relays. I do not remember if there is a high and low for each fan, I don't think so, sinces they run concurrently...you may be able to move them around and run some tests for a bad relay if so. I think based on the scenario, the motor could have some issues preventing from operating on high and may need replacing. The fans will run low, but putting the ac on high should tiger the fans to go high speed....