PINPOINT TEST E : The Defrost System is Inoperative

E1 CHECK THE REAR WINDOW DEFROST GRID VOLTAGE

Disconnect: Rear Window Defrost Grid C402A .

Start the engine.

Activate the rear defrost switch.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C402A-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes	GO to E2.
No	GO to E3.

E2 CHECK THE REAR WINDOW DEFROST GRID GROUND

Ignition OFF.

Disconnect: Rear Window Defrost Grid C402B .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C402B-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes	CARRY OUT the Grid Wire Test. Refer to Glass, Frames and Mechanisms . REPAIR the rear window defrost grid or INSTALL a new rear window glass if necessary. Refer to Window Grid Wire Repair .
No	REPAIR the circuit.

E3 CHECK THE VOLTAGE SUPPLY TO THE REAR WINDOW DEFROST RELAY

Ignition OFF.

Disconnect: Rear Window Defrost Relay.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
Socket Pin 2	Courtesy of FORD MOTOR COMPANY	Ground
Socket Pin 3	Courtesy of FORD MOTOR COMPANY	Ground

Are the voltages greater than 11 volts?

Yes	GO to E4.
No	VERIFY BJB fuses 26 (40A) and 93 (5A) are OK. If OK, REPAIR the affected circuit. If not OK, REFER to the OEM ELECTRICAL WIRING DIAGRAM INTRODUCTION to identify the possible causes of the circuit short.

E4 CHECK THE HVAC MODULE OUTPUT

Start the engine.

Activate the rear window defrost switch.

Measure:

Positive Lead	Measurement / Action	Negative Lead
Socket Pin 1 Courtesy of FORD MOTOR COMPANY	Test Light	Socket Pin 2 Courtesy of FORD MOTOR COMPANY

Does the test light illuminate?

Yes	GO to E5.
No	GO to E6.

E5 CHECK THE REAR WINDOW DEFROST RELAY

Carry out the rear window defrost relay component test. Refer to Component Testing for component testing.

Did the rear window defrost relay pass the component test?

Yes	REPAIR open in circuit CRD06 (BN/YE).
No	INSTALL a new rear window defrost relay.

E6 CHECK THE REAR DEFROST SWITCH (CC_SW_R_DEF) PID

Ignition ON.

Using a scan tool, view FCIM PIDs.

Monitor the FCIM PID CC_SW_R_DEF while pressing and releasing the rear window defrost switch.

Does the PID agree with the rear window defrost switch status?

Yes	GO to E7.
No	INSTALL a new FCIM. REFER to Information and Entertainment Systems Premium (Premium), REFER to Information and Entertainment Systems Premium Plus (Premium Plus) or REFER to Information and Entertainment Systems Sony Sound (Sony ® Sound).

E7 CHECK THE REAR WINDOW DEFROST RELAY CONTROL CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect: HVAC Module C228A .

Measure:

Positive Lead	Measurement / Action	Negative Lead
Socket Pin 1	Courtesy of FORD MOTOR COMPANY	C228A-25

Is the resistance less than 3 ohms?

Yes	GO to E8.
No	REPAIR the circuit.

E8 CHECK FOR CORRECT HVAC MODULE OPERATION

Inspect the HVAC module connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins as necessary
- pushed-out-pins - install new pins as necessary

Reconnect the HVAC module connectors. Make sure they seat and latch correctly.

Reconnect all previously disconnected components and system electrical connectors.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes	CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new HVAC module. REFER to Climate Control EMTC (Electronic Manual Temperature Control (EMTC)) or REFER to Climate Control DATC (Dual Automatic Temperature Control (DATC)).
No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.