Re: heater and ac blower does not work, blue light on...
There are 2 fuses , one in the car by the door in the driver's side and one under the hood(drivers side). Although your problem sounds alot like what happend to my 99 sunfire.It ended up being the restrictor to the blower motor.The restrictor(white plastic bottom) is right behind the blower motor, which is under the dash(glove compartement).
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I'm going to start from the beginning. The blower motor gets power from the high blower relay and it is grounded thru the fan switch and the resistor. So you should have power on the pink white blower wire coming from the high relay to the blower motor. The orange black wire from the motor is ground going to the resistor and fan switch. The blue wires on the control panel are for the ac compressor. The high blower relay gets power from fuse number 5 in the box. The blower motor is grounded thru the resistor and then thru the fan switch. Photo courtesy of AutoZone.com
The brown wire at the speed switch is the power wire. Powers is then directed to the blower motor resistor throught the orange, lt blue and yellows wires. The blower motor receives power through the orange wire.
Check for power at the fuse with the key on. If there is no power the problem could be the ignition switch or the wiring in between the switch and the fuse block
$24the AC light does not light until you turn the fan on, that is ok, the issue with your fan only working sometimes is more than likely a faulty blower motor, in some cases it is the switch, when the motor does not turn on try tapping it and see if that makes it work, if it does then it is the motor. the switch at autozone is part number SW295 and is $16 the motor at autozone with the blower wheel is part number PM136 cost is $24
have you tried to tap on it with the switch on to see if it will come on if not try that first.also see if the ac switch light comes on when you turn on the blower switch with ac button on. if the light comes on on the switch then the fuse should be good for part of the circuit. next thing i would do is unplug the blower motor and with a test light see if the red wire has power on it and if so replace blower motor and if not check the 10amp gauge fuse and the 40 amp heater fuse.if none of this is the problem then there is also a heater relay........most of the time it is either the 10 amp ac fuse or a bad blower motor.......i hope this will help you let me know if i helped you in any way and what you found out...............good luck..........
Mos likely the switch on the dash for the speed settings for the blower motor has gone out. You can check this by using a test light and checking each connection coming out of the switch. If you have fire coming from all the terminals then the blower itself could be bad.
Hello! Here is a test procedure to isolate the fault in the blower motor circuit. Make sure ignition key is off...Remove the glove box... Located on top of the blower assembly box is a connector with the following wires; Blue, blue/white, blue/ yellow, and blue/black. The device that the plug was connected to is called the resistor pack. Two screws hold it in place. Remove the resistor pack and check it for open or burnt resistors. If it is defective purchase a new one. Average cost is $25. If the fan motor did not run in the high position then more testing is required. If the air conditioner dash light comes on when you select A/C that eliminates the A/C switch. Next set the fan speed to first position. Place your ohm meter on the X10 scale and measure between the blue wire to ground...set fan speed to next position; measure between blue/white to ground...set next position; measure between blue/yellow to ground. Set fan to high position; measure between blue/black to ground. All readings should be zero ohms (full meter deflection). If they are not then the fan speed selector switch needs to be replaced. If all readings are correct then replacing the resistor pack will solve your problem.