Hi I got a 98 Dakota 2.5 4 cylinder it has an electric fan and it won't turn on when the truck is running. I change the temp sensor/fan switch???? Or is there another fan switch mounted on the block?. When I unplug the temp sensor the computer turns the fan on and when I trip the relay the fan runs. I have switched the relay and made a new engine to chassis ground, also when I turn the truck off for a split second the fan goes on. I really need some help!!!!! Any info would be appreciated as I am a newbie haha