No blow hello i have a 89 riviera and cannot get the fan to blow at any speed bought new blower motor are there any fuses somewhere else other than by the seat what is a hvac programmer please help Hot Hot down here

94 CHEVY Silverado ????,heat/ac fan not blowing. K1500?????? Hear clicking when selecting l'm, SET high but not blowing! WITH AIR OR NO A/C? FIRST IS FUSES, MAKE SURE THE BLOWER FUSE IS NOT BLOWN.
EASY NO? CHECK ALL FUSES FIRST. ON ALL ELECTRICS FAILING OF ANY KIND.
BAD FUSE, BAD WIRINIG , BAD CONNECTIONS. OR EVEN BAD RELAYS TO THE BLOWER OR BAD SWITCH BLOW.
THE OLD CARS , HAD A SPEED BLOW , RESISTOR BLOCK
THAT FAILS ON ALL SPEEDS BUT HIGH, SO ITS NOT THAT.
OWN A VOLT METER????
HERE IT IS, ANY OF THIS CAN FAIL THIS OLD
WE USES A VOLTMETER TO FIND THE POINT OF FAILURE.
A SHORTED BLOWER MOTOR CAN BLOW LEFT SIDE TOP
FUSABLE LINK.RIGHT FUSE BLOWN MAKES THE CONTROLLER DEAD.

Check blower speed switch on dash. If nothing found then unless it is a loose or broken wire somewhere (check power to the blower motor), it may be the blower motor bearings have worn out and can cause the speed selector (resistor) to burn out as well. I have replaced the motor with a new one (bought from ebay) sent from somewhere from China and it has been working well for now a couple of years without problems. It a lot of work to take out and reinstall the blower housing and I had to make some 'tools' to be able to safely remove the old motor without damage to the plastic housing but it was worth the savings compared to buying the parts from the dealer which only comes as a housing assembly with the motor in it ($$$).

the blower is silent.????????? yes, sounds matter !
ON HIGH TOO? (fan speed max)????
or makes normal sounds, but does not blow.
1 or the other.?

the blower if dead silent can be hot wired (blows now?) (costs zero to do)
or using any voltmeter made. measure for 12vdc on the 2 pin
to motor, fan on high. (costs $10 for tool at walfart)
if 12vdc there, (across the 2 pins) then the fan is bad.
of 0v, the controls are dead.
the fan on most cars. on high, bypass the fan speed resistor block.
what you dont have is the schematic,
its at 2 places (usa ,min)
alldata.com
and suzukipitstoppus. (real fsm book)

2000 GV, data, below.... it takes all of 10sec to look.
all answers, USA cars, as this is a USA forum.
i click HVAC for you.
as you can see the switch is grounded at red circle.
and with fan on high ground (0v) is applied to the motor low pin
and if the relay is hot, (2 fuse good) the output of relay b/w wire
will be at 12vdc, if not the relay is bad.(fuses good)
cant be more simple. same from 89-2000 after that things get harder, (controls) your car has a motor driven mode damper
that is why i asked the sounds questions. as it too can block the air flow. (with a perfectly running fan)

Not sure hat rely you are checking but the blower motor does. To have a relay in the rear fuse block. The fuse you're checking protects the HVAC computer. The HVAC computer uses that circuit to monitor the voltage going to the blower motor.

The most likely problem is the blower motor resistor, aka blower motor module, blower motor speed control. It is typically located near the blower motor. The red wire is power from the battery and should be there all the time. Black is ground. Purple is power to the blower. Grey/black is the speed input from the HVAC module.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Normally when the blower motor goes out it has trouble a few days before and cuts in and out so I would check fuses first but I may be wrong and if the fuses are fine the I would change the motor

Your Buick Riviera's heater fan is powered by a blower motor, which in turn is powered by a blower motor resistor. The resistor is a small electrical component that also regulates the fan speeds of the blower motor. Like any part, the blower burns out from time to time and has to be replaced. Replacement blower motor resistors cost about $50. It will take you about 30 minutes to install a new one in your Buick Riviera.

Things You'll Need

• Socket set
• Screwdriver

1. • 1

     Open the hood and disengage the negative battery cable on your Buick Riviera using your socket set. You will need a 10mm socket to loosen the battery cable bolt.
     

   • 2

     Remove the plastic trim panel under the glove compartment on the passenger side of your Riviera.
     

   • 3

     Loosen and remove the mounting screws that hold the blower resistor in place on your Riviera.
     

   • 4

     Unplug the wiring harness from the old blower resistor and then remove the resistor completely.
     

   • 5

     Plug the wiring harness into your Buick's new resistor. Also tighten the screws to hold the resistor in place.
     

   • 6

     Reattach the negative battery cable on your Riviera and tighten it with your socket set.
     

When the blower works only on the high setting its usually a bad blower resistor which is right near the blower motor. now you say it would always blow high regardless of the fan speed setting that would indicate probably the climate control unit or a connector problem somewhere. finally it not working at all may be the climate control unit or connection went bad even further. it might have a blown fuse or a bad blower motor in addition to the climate control unit or connector problem .check for power and ground at the blower motor. the power is supplied from fuses and may have a relay also. the ground is supplied from the climate control unit and goes through the resistor to control the fan speed. good luck

Hello,
Try your blower on all speeds. Sometimes the high speed will work and that would mean you have a bad resistor for the fan motor.
If it doesn't work on any speed you could have;
1. A blown fuse.
2. A bad fan switch.
3. A bad connection/short somewhere between the switch and the fan motor.
4. A bad fan motor.

This is the order that I would troubleshoot from.

I hope this helps you.

Check the heater blower fuses first. If you have an owner's manual, it will tell you where they are... Might be a bad switch. Try the easy stuff first before you ripp into the dash panel...Good Luck

If the fuse is blown for the blower then there is a short, that is not an answer, go to the blower and check to see that the blower motor connector has 12 volts to it when the blower is set to high speed on control, if it does then u need a new blower motor, if it doesn't then the control switch is defective or the blower motor speed control resistor is defective.