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Without doing a "hands on troubleshooting" of your rear window defogger circuit, NO ONE can tell you for certain what is the specific cause of the failure.
However, the most probable cause is what is called an "open circuit" condition.
Regardless of what causes it, an open circuit condition is the equivalent of turning a switch to the OFF positon. It opens the circuit, cutting off the flow of electricity.
Altough there are probably some causes I haven't thought of at the moment, here are some of the more common causes:
- The fuse for the circuit has "blown" out,
- A connector, or connectors, anywhere in the circuit has become disconnected [unplugged],
- Corrosion has built up on the metal contacts inside of one or more connectors,
- A conductor [wire] in the circuit has been broken or cut,
- The defroster grid glued on the rear window is conductive [like the wires inside of an electric blanket] and are very delicate, and IF only one is broken or damaged, it too will open the circuit.
Find the fault/flaw causing the open circuit, correct it, and the rear window defogger will work again.
What else can I help you with?
Chevy Impala drivers side heated mirror is broke will that cause the rear window defrogger to quit working?
It's very possible as the heated mirrors and the rear defogger are tied together.
What causes whine when Chevy Impala changes gears?
A worn transmission gear can cause a Chevy Impala to whine when the gears change. A bad fan belt can also cause this.
What would cause a 2006 Chevy Impala to make a whining noise when accelerated?
ON the 2006 impala that whining noise is actually the electronics when you accelerate. Its more or less electronic pulses/signals My 06 Impala is the same.
Can you remove the catalytic converter on a 2002 Chevy Impala?
No, cause if you do, the car will blow up due to lack of air circulation...
Have a 1988 Chevy impala with a 305 burning coolant what could be the cause?
a bad head gasket or intake manifold gasket.
When I am driving my 2002 Chevy impala the temperature meter moves from the middle to almost overheating and back what would cause this?
Thermostat.
What electric problem would cause a 2008 Chevy Impala slow to crank?
It could be a weak battery or a bad ignition coil.
What will cause the fan blower motor cruise control and running lights not to operate in a 2000 Chevy Impala?
check the fueses check fueses
What might cause a 2001 Chevy impala 3.8 check light to stay on?
It could be a number of things, you need to have the computer scanned to find out what is wrong.
What might cause a 2001 Chevy Impala to idle up and down?
A bad idle air control sensor or a bad throttle position sensor.
What is the cause of a 2001 Chevy impala makes a rattle noise when accelerating?
Check heat shield on catalytic converterTry going to a higher octane fuel
What if you put 215 will it effect the way it dives?
placing 215 size tires on a standard base 2005 Chevy impala can cause the car to be unstable after speeds of 50mph and is a safety concern which will cause you to fail inspections in most states. the minimum size for a 2005 Chevy impala is 225 or higher depending on the size of the rim. Read user recommendation if this does not fully explain your question.
