I believe the normal fan operation with the AC on is that the fans go on and off as the compressor cycles. This is why some owners complain that the car bucks when the AC cycles. The power spike of the compressor clutch, and both fans starting up is quite a jolt to the marginal electrical system in the DMC. The FanZilla sold by PJGrady will fix the problem by sequentially starting all 3 items instead of the factory simultaneous method. gullwing99@xxxx wrote: <SNIP> > AC on,,,are they suppose to stay on or do they come on and off,,,,,mine are > going on and off,,,if they are suppose to stay on while the AC is on what is > the problem,,,,,,if they are not suppose to,,,,,,thanks anyway