Question about 2005 Chevrolet Silverado

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A/c blower switch replace

A/c blower switch has 5 settings only the first 3 work no fuses blown or wires disconnected

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  • Chevrolet Master
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Replace the blower resister,it controls the speeds,it is located near the blower motor,and has multiple wires going to it.

Posted on Jul 15, 2010

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Posted on Jan 02, 2017

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My fan does not work on any of the four speed settings, i checked fuses and they are good, what else could be causing this problem?


The fan itself may have failed. Try this though which worked for me one freezing winter night. Locate the blower under the hood. Hit the rounded end of it with a block of wood. The motor has carbon brushes which can stick and loose contact with the commutator that the brushes run on. Hitting it will dislodge them and put them back in contact.

There is sometimes a capacitor on the motor and this can also fail.

Nov 08, 2015 | 2002 Isuzu Rodeo

1 Answer

The heater blower motor stopped working on my 95 suzuki sidekick.


if it dont blow on high , it can only be 3 things. (wires are always suspect and conn.. in all electrics.)
1: blown fuse.
2: bad switch (see link, below for how to fix THIS switch.)
3: bad blower motor.
there are 2 ways to find it, not guessing...
A: use a voltmeter, Got 12vdc to motor on fan?
no ? then got 12vdc into switch? yes, then switch is blown
B: hot wire fan, work now, yes, motor good.

see no heat page'

http://www.fixkick.com/AirCond/heater.html


see it here. the 25amp fuse, fan draws about 15amps
http://www.fixkick.com/power-elect/fusepanel-left-knee1w.jpg

most cars call this blower. (new cars have up to 5 fans)

these Suz, dont have spare switches now, for many older year cars.
see list above for p/n of the ones they do, this is one of the hardest
parts to source on zuk and some have CAMI switches and others have Japan real . (production options..)

Feb 11, 2014 | 1995 Suzuki Sidekick

1 Answer

Precor error codes 53


Precor Error 53, Can't Read Target, Can't Find Home Switch Probable Cause 1. Blown F2 fuse.
2. Home switch wiring is damaged or has intermittent connection.
3. Gear (elevation/incline) motor wiring is damaged or has intermittent connection.
4. Home switch is bad.
5. Gear (elevation/incline) motor is bad.
6. Gear (elevation/incline) motor target is damaged.
7. Lower PCA is bad.
Corrective Action
  1. Disconnect power from the unit. Remove the F2 fuse from the lower PCA. Using an ohm meter, measure the fuse for 1 ohm or less. If the reading is considerably high, replace the fuse. If the fuse is blown, inspect further for the cause to avoid the fuse blowing again. Inspect for damaged gear motor wiring or a bad gear (elevation/incline) motor. Replace if necessary.
  2. Thoroughly inspect the home switch wiring for damage or intermittent connections. Repair or replace damaged wiring or poor connections as necessary.
  3. Thoroughly inspect the gear (elevation/incline) motor wiring for damage or intermittent connections. Repair or replace damaged wiring or poor connections as necessary.
  4. Ensure the moving arm is away from the home switch and disconnect power from the unit. Disconnect both wires from the home switch. Using an ohm meter, check for approximately 0 ohms. Continue to monitor the home switch resistance and activate the home switch by hand. The reading should change from approximately 0 ohms to open (infinite). If either reading is considerably incorrect, replace the home switch.
  5. With unit disconnected from power, disconnect both wires from the gear (elevation/incline) motor. Using an ohm meter, check for approximately 9 ohms through the gear (elevation/incline) motor wiring. If the reading is considerably high or low, replace the gear motor.
  6. Inspect the gear (elevation/incline) motor target for rips, tears, or bad scratches. If any of these are found, replace the target.
  7. During the start up sequence, check the voltage at the gear (elevation/incline) motor. Voltage should be approximately 12VDC. The voltage should only be present between the time the sequence was started and the error 53 occurred. If the voltage is considerably low or absent and the F2 fuse proved good, replace the lower PCA.
Precor Error Code 53

Nov 02, 2013 | Cars & Trucks

1 Answer

My blower only works 1 through 4 and will not work on the highest position number 5


{: ) Check out the J-case fuse (square) labeled BLWR 40amps at the underhood fuseblock. This fuse is the source of power to the blower motor when position 5(max speed) is selected. If this fuse is tested to be okay, you need to access for the blower resistor connectors. Turn ignition on, and set blower to max speed (#5). Probe on the blower resistor terminal (orange wire) and you should get 12volts, also probe the terminal (red wire) which came from the 40amp fuse. 12v should be present on these two terminals at the blower resistor when at max blower speed. Particularly on the orange wire, if you don't get 12volts when at #5 position, it 's probable that the blower speed control switch is faulty. But if you did got 12volts during the procedure, then you should replace the blower motor resistor. Goodluck.

Jul 24, 2011 | 2006 GMC Envoy

1 Answer

BLOWER FAN WILL NOT RUN ON HIGH SPEED. WHAT TO CHECK??


The relay for the manual blower system is a different relay from the others. It has terminal 87 which is the high amp terminal. It comes through fuse 3 on the relay center, a 30 amp fuse. It it is right hand underhood.

The relay also contacts terminal 87A which is the lower power circuit that gets 25 amp from fuse 5D in the instrument panel fuse block. That supplies the 3 lower speeds and when switched to high applies voltage to the relay switching it from the 25 amp circuit to the 30 amp circuit.

The SAME wiring supplies the blower from the relay on to the blower. The blower uses only one ground which is terminal B on the blower motor. Your motor should have run the same but when you disconnected the terminal socket for both A and B from the blower motor, there was no ground. You do have to supply your own ground!

Easy check is fuse 3 in the relay center. Hope it's blown. Might question why it blew, but that's an easy replacement. I might indicate impending blower motor failure with age and high current loads.

it could indicate the relay is stuck on the 87A contact and not switching under power to the other terminal. Could be primary circuit blown not pulling the relay or could be the contacts are physically burned to the most-used contact.

Jun 06, 2011 | Chevrolet Corvette Cars & Trucks

1 Answer

The heater fan does not work what could be the problem


Did you try the fan on HI? If it works on HI only, the blower motor resistor is bad. If the fan fails to operate at any setting, disconnect the wire harness from the blower motor, and connect a test light to the wire harness. Turn on the car, and try the switch. If the test light turns on, the circuit is ok, and a bad blower motor is indicated. If the test light will not turn on, you have a problem in the circuit. Possible blown fuse or faulty fan switch.

Sep 25, 2010 | 2003 Chevrolet Impala

1 Answer

Electric windows and tempeture on dash are not working


IF ALL WINDOWS ARE NOT WORKING IT LOOKS LIKE.THE POWER WINDOW CIRCUIT BREAKER IS BLOWN.CHECK THE HEATER AND AC IGNITION FUSE.MAKE SURE POWER IS AT THE SWITCH.IF ALL IS GOOD.CHECK BLOWER MOTOR FUSE AND RELAY.IF THEY ARE GOOD.HOT WIRE BLOWER MOTOR IF IT WORK YOU HAVE A BAD BLOWER MOTOR SWITCH AND RESISTOR.IF BLOWER MOTOR DONT WORK.REPLACE BLOWER MOTOR.

Aug 26, 2009 | 2007 Ford Focus (3 Door) Hatchback

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