Hello its been a few weeks since I have been online. Ive went through a big move and my car began overheating mid way through it. Ive ruled out headgasket, water pump, thermostat, faulty fan motor, faulty fan relays, and the wiring between everything. My issue is when I am driving the fan never comes on except for when the air conditioner is on. Occasionally it comes on by itself without the AC. I tried replacing the fan switch with no luck. Metered all wiring and checked the 2 relays by the air box for proper operation. Even so, when it comes on it only runs on low speed. When I unplug the connector to the switch the fan kicks on very high and I can drive the car all day in high heat and traffic with no overheating. I'm at a loss as to why it is not kicking on high by itself. Other than the PCM I cannot think of anything else that would be going bad. I don't know of it matters too much this car does have AC and it works well except for when the overheating conditions occur, it begins to blow hot. It seems like it may be associated with the fan not kicking on high. The last few times I have ran into this issue I stopped and checked to make sure the fan was running. It was running every time, but only on low speed. I cannot seem to make it turn on high by itself. I could always add a toggle switch to manually control it, but I would prefer the car works as it was designed. Not to mention if the wife drove it, she would never remember. Any help would be appreciated. Thanks, Paul Edit: I forgot to mention above that I have recently had grounding problems with that wack connector on the negative lead. I understand that this is the ground for the PCM among other things. Would any of that directly affect my fan like this? Also reading up it sounds like the AC should kick my fan on high, when I turn on the AC it kicks on low.