Ford Galaxy / Ford S-MAX. Manual — part 920

Yes

GO to D15

.

No

Repair circuit CRD02A (BN/BU). TEST the system
for normal operation.

D15: CHECK FOR CONTINUITY BETWEEN THE HEATED REAR WINDOW RELAY AND
THE HEATED REAR WINDOW GRID WIRE

Measure the resistance between the heated rear
window relay RA2 pin 5, circuit CRD06B (BN/YE),

harness side and the heated rear window grid wire
C4RD02-A pin 1, circuit CRD06B (BN/YE), harness
side.

1

Is the resistance less than 5 ohms?
Yes

CARRY OUT the CJB self-test. REFER to WDS.
CARRY OUT the Heated Rear Window Glass Relay
component test. REFER to the Wiring Diagrams.

No

REPAIR circuit CRD06B (BN/YE). TEST the system
for normal operation.

D16: CHECK FOR CONTINUITY BETWEEN THE HEATED WINDSHIELD SWITCH AND
THE CENTRAL JUNCTION BOX (CJB)

Ignition switch in position 0.

1

Disconnect CJB C1BP02-C.

2

Disconnect Heated Windshield Switch C2RD09-B.

3

Measure the resistance between the CJB C1BP02-C
pin 31, circuit CRD08A (GN/OG), harness side and

the heated windshield switch C2RD09-B pin 1,
circuit CRD08A (GN/OG), harness side.

4

Is the resistance less than 5 ohms?
Yes

GO to D17

.

No

REPAIR circuit CRD08A (GN/OG). TEST the system
for normal operation.

D17: CHECK FOR CONTINUITY BETWEEN THE HEATED WINDSHIELD SWITCH LED
AND THE CJB

Measure the resistance between the CJB C1BP02-C
pin 44, circuit CRD03A (BU/GN), harness side and

the heated windshield switch C2RD09-B pin 2,
circuit CRD03A (BU/GN), harness side.

1

Is the resistance less than 5 ohms?
Yes

CARRY OUT the CJB self-test. REFER to WDS.
CARRY OUT the Heated Windshield Glass Switch
component test. REFER to the Wiring Diagrams.

No

REPAIR circuit CRD03A (BU/GN). TEST the system
for normal operation.

D18: CHECK FOR VOLTAGE TO THE HEATED WINDSHIELD GLASS RELAY

Ignition switch in position 0.

1

Disconnect Heated Windshield Glass Relay R6.

2

Measure the voltage between the heated
windshield glass relay R6 pin 3, circuit SDC02A

(RD), harness side and ground.

3

Is the voltage greater than 10 volts?
Yes

GO to D19

.

No

REPAIR circuit SDC02A (RD). TEST the system for
normal operation.

D19: CHECK FOR CONTINUITY BETWEEN THE HEATED WINDSHIELD GLASS RELAY
AND THE HEATED WINDSHIELD GRID WIRE

Disconnect Heated Windshield Grid Wires C2RD03
and C2RD04-A.

1

Measure the resistance between the heated
windshield glass relay R6 pin 5, circuit CRD06B

(BN/YE), harness side and the:

Left-hand heated windshield grid wire C2RD03
pin 1, circuit CBB34B (VT/BN), harness side.
Right-hand heated windshield grid wire C2RD04-
A pin 1, circuit CRD35A (YE/GY), harness side.

2

Is the resistance less than 5 ohms?
Yes

GO to D20

.

No

REPAIR circuit CBB34B (VT/BN) or circuit CRD35A
(YE/GY). TEST the system for normal operation.

D20: CHECK FOR CONTINUITY BETWEEN THE HEATED WINDSHIELD GLASS RELAY
AND THE CENTRAL JUNCTION BOX (CJB)

Disconnect CJB C1BP02-A.

1

Measure the resistance between the CJB C1BP02-A
pin 30, circuit CRD01A (VT/OG), harness side and

the heated windshield glass relay R6 pin 2, circuit
CRD01A (VT/OG), harness side.

2

Is the resistance less than 5 ohms?
Yes

CARRY OUT the CJB self-test. REFER to WDS.
CARRY OUT the Heated Windshield Glass Relay
component test. REFER to the Wiring Diagrams.

No

REPAIR circuit CRD01A (VT/OG). TEST the system
for normal operation.

PINPOINT TEST E : THE DEFROST SYSTEM WILL NOT SHUT OFF
AUTOMATICALLY

TEST CONDITIONS

DETAILS/RESULTS/ACTIONS

E1: CHECK FOR CONTINUITY BETWEEN THE HEATED WINDSHIELD GLASS RELAY AND
GROUND

NOTE: Use a digital multimeter for all electrical measurements.

Disconnect CJB C1BP02-C.

1

Disconnect Heated Windshield Glass Relay R6.

2

Measure the resistance between the heated
windshield glass relay R6 pin 2, circuit CRD01A

(VT/OG), harness side and ground.

3

Is the resistance less than 5 ohms?
Yes

REPAIR circuit CRD01A (VT/OG). TEST the system
for normal operation.

No

GO to E2

.

E2: CHECK THE HEATED WINDSHIELD GLASS RELAY CIRCUIT FOR A SHORT TO
POWER

Ignition switch in position II.

1

Measure the voltage between the heated
windshield glass relay R6 pin 5, harness side and

ground.

2

Is the voltage greater than 10 volts?

Component Tests

Heated Rear Window Grid Wire Test

1. 1. Using a bright lamp inside the vehicle, visually inspect the grid wire from the

outside. A broken grid conductor line will appear as a brown spot.

2. 2. Run the engine at idle. Set the heated rear window switch and lights to ON. The

heated rear window indicator light should illuminate.

3. 3. Working inside the vehicle with a multimeter, contact the broad red/brown strips

on the heated rear window positive lead to battery side and negative lead to ground
side. The meter should read 10-13 volts. A lower voltage reading indicates a loose
heated rear window ground wire connection at the heated rear window ground wire

Yes

REPAIR circuit CBB34B (VT/BN) or circuit CBB35A
(YE/GY). TEST the system for normal operation.

No

GO to E3

.

E3: CHECK FOR CONTINUITY BETWEEN THE HEATED REAR WINDOW RELAY AND
GROUND

Ignition switch in position 0.

1

Disconnect Heated Rear Window Relay RA2.

2

Measure the resistance between the heated rear
window relay RA2 pin 2, circuit CRD02A (BN/BU),

harness side and ground.

3

Is the resistance less than 5 ohms?
Yes

REPAIR circuit CRD02A (BN/BU). TEST the system
for normal operation.

No

GO to E4

.

E4: CHECK THE HEATED REAR WINDOW RELAY CIRCUIT FOR A SHORT TO POWER

Ignition switch in position II.

1

Measure the voltage between the heated rear
window relay RA2 pin 5, circuit CRD06B (BN/YE),

harness side and ground.

2

Is the voltage greater than 10 volts?
Yes

REPAIR circuit CRD06B (BN/YE). TEST the system
for normal operation.

No

VERIFY the customer concern.