Use a flashlight and your hand. Carefully though, things may be hot.
Perhaps a bad fan resistor
replace the blower fan resistor and you`ll be okay
in side the fan blower under glove department on passenger
Your AC fan is not working on the maximum setting because you have a bad blower motor resistor. This is located under the dash or next to the blower motor.
The blower motor resistor has failed.The blower motor resistor has failed.
see link below
Could be a bad fan motor resistor
If the fan runs in high but not the other speeds the resister is bad. Done.
The inside ac fan doesn't have a relay. The resistor is part af the motor housing, there is a switch, and a fuse.
Blower fan resistor under glove box...by passenger's feet...!
A resistor, by itself, can not convert DC into AC.
Check the fan speed resistor mounted in the blower assy. it could be open or shorted!