Blower motor control?
same as low speed relay its call fan mode
Yes, there is a high speed relay and it should be in the fuse/relay center under the hood.
If only high speed is effected check the high speed relay and/or the fan switch/electrical connections for problems.
The switch had a meltdown or the high speed relay is stuck.
There should be a smaller plastic box behind the fuse box in the engine compartment. There you will find the high speed fan relay as well as the low speed fan relay.Good Luck
AC compressor clutch relay, starter relay, high speed blower motor relay,
Could be the switch and pigtail at fault or the high speed relay.
A fan or cooler relay is used in electrical furnace to change the blower speed to the blank speed for cooling
The high-speed fan relay in under the hood on the firewall left of center. If I remember correctly, there are 3 relays on the 1996. The relay closest to the passenger side is the high-speed relay. I had to replace it twice in my 1996 blazer You will propbably find that the plastic is melted slightly
The high speed blower relay is located on the engine bulkhead bracket next to the blower motor. === ===
A typical blower motor relay only operates the high speed function.
Replace the high speed relay.