Electrical problem effecting several things; the fan blower motor does not work at all, the interior lights do not work, the cruise control does not work, and the automatic seatbelt does not work. Also, the turn signal doesn't flash, it just stays on, so I have to manually move the lever back and forth. One last thing, the wipers also stay on, so to turn them off, I have to remove the fuse. Fun one, huh? Is there a commom problem here, like a bad relay or switch?
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Re: No A/C due to electrical problem
Sounds like a biggie here. Never heard of that, all at the same time. It's uncommon. Electromechanic right away. worst thing that could happen, an electrical fire. Multiple shorts in several devices, it's been a miracle what's been saving this car, and yourself from a catastrophe.
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Likely the fan blower electrical plug has poor contact or the blower motor or resistor needs replaced (which is what the plug pushes onto). Under right side (passenger side) of dash, the blower motor casing is in the corner, look for a plug with several wires and just try wiggling it a little or pull off then put back on and see if fan now works on other speeds. If still will not then most likely the resistor needs replaced which can be done by removing the two screws seen on housing and just pull out. If resistor is bad then the fan will only work on high.
Usually the first thing to inspect when the blower fan stops working is the fuses to see if any are blown. Locate the 10A cluster fuse or the 25A HVAC fuse in your car manual, and examine them to determine if they need replacing. The car owner's manual will tell you where to find the fuses that are connected to the heat and/or air conditioning. On the interior fuse panel of the car, a 30 amp fuse is labeled "Heater" or "HVAC."
Bad Blower MotorIf the fan only works on setting number 3 or 4, or just on the highest setting, it is most likely that your blower motor is failing and is about to die. Use a voltmeter to test the amount of voltage at the blower motor connector with your ignition on and AC running. If it reads 12V, the motor needs replacing.Automatic Climate Control SystemAnother thing that causes the blower fan to malfunction is the Automatic Climate Control System (ACCS). If the ACCS's settings are off, it may cause the fan to stop working. If it is the climate control on the car, typically it is a bad thermostat or electrical circuit that is the culprit. hope this helps, James Booth
(1) possible blown fuse. Note that fuses blow for a reason - seek out the reason, or it will blow its new fuse too.
The main fuse block is located inside the left side of the
engine compartment near the battery. There is also an interior fuse
panel located just above the left side kick panel.
Interior Fuse Panel The interior fuses simply unplug
from the fuse panel. Use the fuse puller tool provided with your car to
remove fuses from the panel. The tool is located on the back of the
interior fuse panel cover.
(2) possible blower motor dead. See maintenance manual excerpt below.
(3) possible blower motor relay faulty. Location of Blower relay: Under hood, drivers side, front engine area,rear of headlight housing; relay mounted on drivers side of radiator shroud.
1990-92 Mazda 626 and MX-6 See Figure below
Disconnect the negative battery cable.
Remove the glove box and the underdash cover.
Detach the electrical connectors from the blower unit.
Remove the blower unit-to-fire wall attaching bolts and remove the blower unit assembly.
Remove the blower motor fan-to-motor fastener.
Remove the blower motor-to-unit attaching bolts, then remove the motor.
Installation is the reverse of the removal procedure.
What can go wrong with a blower motor? There are
several things that may cause your blower motor to stop working. The
simplest cause would be a blown fuse. If you replace the fuse and it
quickly blows again, then you probably have an electrical short.
Disconnected wires on the exterior of the blower motor can also cause it
stop working, and if your blower motor gets dirty, it can get clogged
or muddy which keeps the fan blades from spinning.
How do I test my blower motor? When
you are troubleshooting your blower motor, it is best to start by
running the air conditioning or the heater to see if you can hear the
sound of the fan. If you can hear the fan, it could be clogged or
corroded with dirt. If you do not hear the fan, then you may have a bad
resistor, blown fuse, or a loose wire. Next, you should replace any
blown fuses in your car's fuse panel and try to start the blower motor
again. If another fuse blows right away, you have an electrical short.
If it doesn't blow out and the motor is still silent, then something
else is wrong. In the case where the fuse lasts for a little while as
the fan spins but then the fuse blows again, that usually means you need
to replace the brushes on the motor. Finally, you can pull the motor
out and visually inspect it for loose wires. If you don't see any and
still want to test, try hooking it up to the battery to see if the motor
will start. If all these tests still find you with a dead blower motor,
it's definitely time to replace it.
How do I replace it? Usually
located under your vehicle's instrument panel, the blower motor can be
removed and replaced. You'll need to disconnect the blower motor
connector and remove the retaining screws holding it into place. Detach
the fan retainer clip from the motor shaft that's located in the center
of the blower wheel. You may need to save that piece if you are not
replacing the whole motor. Inspect your new motor to ensure nothing is
broken and the blades can properly spin. Re-attach the fan retainer
clip, the retaining screws, and the connector so you can test your new
blower motor out.