Rear defrost won't work in 2000 alero v6 - 2000 Oldsmobile Alero

There are only 3 things to look for, 1, is there power at demister checked with a volt meter on the wire connector on the back window. 2, is the earth wire connected again with a volt meter at the back window. and lucky last,3, check the ohms on the back window

Hi,
Plz check your fuses and relays. Either under the hood, dash or both.
GL,
Td

You definatly have water inside the car. Pull the carpet back in the front and rear checking for water leaks. The only way frost can develope inside a vehicle is the presents of moisture.
The other possibility is your HVAC drain is plugged and water has built up inside the heater motor area. Have the drain checked and cleaned.

There is a connector going to rear defrost on the rear window. Disconnect this and check for voltage with defrost on. If this is good, check resistance for the connection to window. This will tell you if the electrical is working or the element is bad for the window if there is a open reading on multimeter.

2000 Oldsmobile Alero 3.4 liter V-6 VIN "E"




Hope helps (remember rated this).

It sounds like an electrical nightmare. The rear defrost and the blower motor are probably not related. The fact that the blower motor only runs on high is because the blower motor resistor is bad. I'm guessing the blower motor is just worn out that's why that quit. As far as the turn signal problem, not a clue there, maybe a bad ground somewhere or you're getting feedback from another circuit. Electrical problems are tough enough when they're right in front you, let trying do solve them via email. You need an electrical wiz for a mechanic.

Have there been any children playing in the back window? Children are good at sctaching the small defrrroster grid lines. Look for small breaks in any of the lines, on break and the defroster wont work. these can be repaired and here are a couple of links if that is where your porblem is.

http://www.glasslinks.com/tips/defrost1.htm

http://www.popularmechanics.com/how_to_central/automotive/1272291.html#

Sounds like the wheel bearing... try jacking the car up and moving the rotor forward or backward. if you hear a grinding noise, or if the rotor moves sideways... like rock it.. then its definately that. I have the same problem with the service engine soon light... try removing the positive on the battery then waiting 30 seconds and putting back on. should reset the cpu.

There's a junction box behind passenger rear door that has 2 wires that are joined from the front and control the rear defroster and radio antenna.

Sounds like a headgasket problem.
If this is the 3.4 liter v6, they are good for the rear headgasket being blown. This lets combustion gases into the cooling system, and causes the coolant to overflow the tank.
See this page for some help....
http://www.greatautohelp.com/more_oldsmobile_questions.html