My cooling system fan retired on my 1990 SC. The motor would not turn leading me to replace the motor. When inspecting the motor, the female three-pin connector showed signs of high heat (I assume from the motor bearing seizing and 12VDC being applied to the low and/or high speed setting caused the deformation of the pin-ins in the connector). Upon replacement of the fan motor, I started the engine, engaged the A/C system and the fan did not operate. I then allowed the engine to obtain normal operating temperature to assure thermostat operation and continued to allow the engine coolant temperature to rise. The fan did not engage at high temperature. I have inspected the wiring from the male fan motor electrical connector to the first harness break-out and find no damage to the wiring insulation. My code reader shows no codes. What next, check IRCM relays?