[hayhauler71]

. Check voltage on the Gray/Black wire at the blower control module, check for 8 volts on high blower speed and about 2 volts on low speed . If it is OK, check the B+ on the Red wire and ground. Before replacing the blower module, amp draw the blower motor. The blower motor should draw less than 15 amps running on the Black wire. If all this is good, then the blower module needs to be replaced