Operation

OPERATION

The rear condenser fan relay is an electromechanical switch that uses a low current input controlled by the A/C-heater control to provide a high current output to the two rear A/C system condenser fans. Two movable, common feed relay contacts are held against the fixed, normally closed relay contacts by spring pressure. When the electromagnetic relay coils are energized, they draw each movable common feed relay contact independently away from the fixed, normally closed relay contacts and, holds them against the fixed, normally open relay contacts. This action allows high current to flow to each of the rear A/C condenser fans as required.

When a relay coil is de-energized, spring pressure returns the movable relay contact back against the fixed, normally closed contact point. A resistor or diode is connected in parallel with each relay coil to help dissipate voltage spikes and electromagnetic interference that can be generated as the electromagnetic field of the relay coils collapse.

The rear condenser fan relay is connected to the vehicle electrical system through a wire lead and connector located on top of the vehicle, near the left side of the rear A/C condenser.

The rear condenser fan relay cannot be repaired and must be replaced if inoperative or damaged. Refer to the appropriate wiring information for rear condenser fan relay and rear A/C system wiring diagrams.