Rear end Door Window / Back Window Defogger Wire Inspection

NOTE:

When cleaning rear window glass, use a dry cloth to wipe it along heat wire (1) direction.
When cleaning glass, do not use detergent or abrasive-containing glass cleaner.
When measuring wire voltage, use a tester with negative probe (2) wrapped with a tin foil (3) which should be held down on wire by finger pressure.

Fig 1: Placing Negative Probe Wrapped With Tin Foil On Wire

Courtesy of SUZUKI OF AMERICA CORP.

Wire Damage Inspection

Turn ignition switch to ON position.
Turn on defogger switch.

Measure voltage at each position(s) as follows. For wagon model:

Measure voltage at the center of each defogger wire (1), and check defogger wire condition according to the following table. For sedan model:

Measure voltage at position "a" and position "b" of each defogger wire (1), and check defogger wire condition according to the following table. If defogger wire open is found, go to next step.

Defogger wire voltage for wagon model

DEFOGGER WIRE VOLTAGE FOR WAGON MODEL

Voltage	Circuit
10-12V	Defogger wire open between its center and defogger wire power source terminal end (2)
4-6V	Normal condition
0-1 V	Defogger wire open between its center and defogger wire ground terminal end (3)

Defogger wire voltage for sedan model

DEFOGGER WIRE VOLTAGE FOR SEDAN MODEL

Measuring position	Voltage	Circuit
"a"	10-12V	Defogger wire open between defogger wire power source terminal end (2) and position "a"
	7-9V	Normal condition
	4-6V	Defogger wire open between position "a" and center line (4)
"b"	4-6V	Defogger wire open between center line (4) and position "b"
	2-4V	Normal condition
	0-1 V	Defogger wire open between position "b" and defogger wire ground terminal end (3)

Fig 2: Measuring Defogger Voltage

Courtesy of SUZUKI OF AMERICA CORP.

Touch voltmeter negative (-) lead to defogger wire ground terminal end (1).
Touch voltmeter positive (+) lead with a foil strip to defogger wire power source terminal end (2), then move it along wire to defogger wire ground terminal end(1).

For wagon model:

The place where voltmeter fluctuates from 10 - 12 V to 0 - 1 V is where there is open.

For sedan model:

The place where voltmeter fluctuates from 10 - 12 V to 4-6 V or 4-6 V to 0-1 V is where there is open.

If found defective, repair defogger wire referring to "REAR END DOOR WINDOW / BACK WINDOW DEFOGGER WIRE REPAIR :".

Fig 3: Measuring Defogger Voltage

Courtesy of SUZUKI OF AMERICA CORP.