Normal Operation

WARNING: This page is about a different car, the 2003 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.

Under normal operation, the coolant control valve receives battery voltage through circuit 30-FB3 (RD/OG)/30-FA1 (RD). The coolant control valve is provided a ground through circuit 91S-FB3 (BN/BL) and/or 91S-FB4 (BN/GN) from the Dual Automatic Temperature Control (DATC) module, depending on which side of the heater core the warm coolant is to flow through.

Under normal operation, the auxiliary coolant pump relay coil receives a ground from the Dual Automatic Temperature Control (DATC) module through circuit 91S-FA76 (BN/BL). The Coil receives battery voltage through circuit 30-FA74 (RD/GN). Battery voltage is supplied to the relay contacts from circuit 30-FA74 (RD/GN). When the relay coil is energized, voltage is delivered to the auxiliary coolant pump motor through circuit 30S-FB1 (RD/YE). Ground for the motor is provided through circuit 31-FB1 (BK/YE).