
CHASSIS ELECTRICAL –
Antenna / Rear Window Defogger
54-50
REMOVAL SERVICE POINT
A
A
"
ANTENNA AMPLIFIER ASSEMBLY REMOVAL
Take off the left-hand edge of the hand lining and undo the
clips of the antenna amplifier assembly.
REAR WINDOW DEFOGGER
TROUBLESHOOTING <VEHICLES
WITH AUTOMATIC A/C>
Refer to GROUP 55.
ON-VEHICLE SERVICE
PRINTED-HEATER CHECK
1.
Run engine at 2,000 r/min. Check heater element with
battery at full.
2.
Turn ON rear window defogger switch. Measure heater
element voltage with circuit tester at rear window glass
centre A.
Condition is good if it indicates about 6V.
3.
If 12 V is indicated at A, there is a break in the negative
terminals from A.
Move test bar slowly to negative terminal to detect where
voltage changes suddenly (0V).
4.
If 0 V is indicated at A, there is a break in the positive
terminals from A. Defect where the voltage changes
suddenly (12 V) in the same method described above.
DEFOGGER RELAY CONTINUITY CHECK
Battery voltage
Terminal No.
Battery voltage
1
3
2
5
Power is not supplied
Power is supplied
Normal characteristic curve
Voltage
A (Centre point)
approx. 6 V
Positive
terminal
Printed heater line
Negative
terminal
Abnormal characteristic curve
Voltage
Open-circuit
point
Positive
terminal
Printed heater line
Negative
terminal
Junction block
Defogger relay