PLEASE HELP I've tried everything I know lol. I have a 97 4.6 set cobra that we've recently put a heater core in and ever since it's been overheating and the cooling fan won't kick on iv checked the fuse. there's no leaks or blockages in the heater core and have good flow through the coolant bridge, no air pockets, I've replaced the fan, coolant temp sensor& gauge sensor, thermostat ( new and opening and closing properly), new coolant res. with sensor, new ccrm did a ohms test to make sure the new one was good.I have ground at the plug but no power I check the wires from the plug to the ccrm and have good tone through the whole wire but still have no idea why it's not getting power. the only thing we didn't do when we replaced the heater core was recharge the a/c because we replaced the core in Nov and didn't need to recharge it then. but could that be the issue?