Rear defrost not working, light always on? 3rd Gen T4R
#1
Rear defrost not working, light always on? 3rd Gen T4R
Rear defrost isn't working and the light is always on. It will not turn off. Fuses appear okay and interior dome, rear wiper and window work fine. Any ideas? I wasn't able to find anything thus far.
#2
Contributing Member
A quick and easy check: The wiring under the rubber boot between the hatch and the body. One or more of those wires are often broken, there could be a little electrical shenanigans going on there. It'd be cool if it were something that simple.
#6
Registered User
iTrader: (1)
You did test both switches with your meter to make sure they were good or bad??
Could be both switches have failed in the same manor.
You mean the light is on all the time??
once the ignition is turned one.
it means for some reason the part of the switch that has the light is able to complete the circuit to ground .
Which allows the light to be on.
Could be both switches have failed in the same manor.
You mean the light is on all the time??
once the ignition is turned one.
it means for some reason the part of the switch that has the light is able to complete the circuit to ground .
Which allows the light to be on.
#7
what year 4runner?
If up to 98, then most likely the relay is back feeding the switch as its shorted out. If 99 or newer, it has a body ecu that controls the rear defrost and side mirror defrost. The "body ecu" is built into the fuse block thats in the driver knee area.
If up to 98, then most likely the relay is back feeding the switch as its shorted out. If 99 or newer, it has a body ecu that controls the rear defrost and side mirror defrost. The "body ecu" is built into the fuse block thats in the driver knee area.
Last edited by vital22re; 06-25-2015 at 08:16 PM.
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