Rear Window Defogger - Troubleshooting
16-130spec tableGround points in the Poor ground column differ by drive side: G301, G401 (LHD) vs [G201, G401] (RHD).
Troubleshooting
NOTE
The numbers in the table show the troubleshooting sequence.
Defogger operates, but indicator light does not go on.
Blown indicator light bulb1
Blown No.18 (10A) fuse (in the dash fuse box)
Blown No.36 (20A) fuse (in the main fuse box)
Defogger switch
Function test
Defogger relay
Repair defogger wire
Poor ground
Open circuit in wires or loose or disconnected terminals
Defogger does not operate and indicator light does not go on.
Blown indicator light bulb
Blown No.18 (10A) fuse (in the dash fuse box)1
Blown No.36 (20A) fuse (in the main fuse box)
Defogger switch2
Function test
Defogger relay
Repair defogger wire
Poor groundG301, G401 [G201, G401]
Open circuit in wires or loose or disconnected terminalsBLK/YEL or BLK/GRN¹
Defogger does not operate, but indicator light goes on.
Blown indicator light bulb
Blown No.18 (10A) fuse (in the dash fuse box)
Blown No.36 (20A) fuse (in the main fuse box)1
Defogger switch
Function test2
Defogger relay3
Repair defogger wire
Poor groundG511, G551
Open circuit in wires or loose or disconnected terminalsYEL/GRN or BLK/GRN²
Broken defogger wire
Blown indicator light bulb
Blown No.18 (10A) fuse (in the dash fuse box)
Blown No.36 (20A) fuse (in the main fuse box)
Defogger switch
Function test
Defogger relay
Repair defogger wire1
Poor ground
Open circuit in wires or loose or disconnected terminals
[ ] : RHD