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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It's common for interior blower speeds to only work on high when the blower resistor goes out. Usually located close to the blower motor. An electrical box/module with wires going to the fan motor. Goggle how to change it, and you'll know whether you can.
That is the heater / AC blower motor ! There are electrical circuits and relays and blower motor resistor , blower motor etc... Electrical testing is the way to diagnose blower motor circuit . Looking at a wiring diagram to see what controls the blower motor on your particular vehicle would be the first step in diagnosing your problem . Do you know how to do automotive electrical testing , how to read or follow a wiring diagram ? Videos on youtube show how to test blower motor and related parts and wiring . Blower Motor and Resistor Diagnostics by Wells
Rather then rigging it , fix it right ! The blower motor could be bad . Testing the electrical circuit , checking current draw , voltage drop . etc.... Hooking up a light switch isn,t going to keep it on if parts are failing . More then likely the blower motor control processor is going bad . The blower motor is electronically controlled . HVAC Blower Motor Circuit
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.