What model?
This probably has electronic Climate control,therefore there isn't a Blower resistor.
The blower is controlled by a Blower Motor Module...its mounted on the HVAC case under the hood near/next to the blower motor.
Check the blower motor resistor/relay pack usually under the hood connected to the blower motor. You can start by using a multimeter and see if you are getting voltage to the blower motor electrical connector. It should read between 12 and 15v. If not then most likely the resistor/relay need to be replaced.
In a 1988 Chevy 2500, the blower motor resistor can be found on the passenger side. It usually is behind the glove box.
The blower resistor is usually found attached to the A/C-heater box under the hood.
The blower resistor board is mounted underneat the blower motor. They are both accessible by taking off the long plastic cover at the top of the firewall from inside the engine compartment.
There is a fuse for the blower motor on the fuse panel, I do not know of a relay.
it is behind the glove box
on the 89 dynasty, it is located right next to the thermostat
on the 89 dynasty, it is located right next to the thermostat
where is the location of ac blower relay
On the 88, remove the glove box by removing all the screws you see when you open the glove box door. You will see a 4 wire connector off to the right. It is plugged into the resistor. This is a common failure when any of the lower speeds of the blower motor fan don't work (high speed is not affected by the resistor).
You don't bypass it, you replace it. It doesn't cost that much
most vehicles have one circuit(and one fuse) for the first 3 fan speeds and a separate circuit and fuse for the highest speed.AnswerCHECK THE BLOWER MOTOR RESISTOR