Need to know what year. FYI, the relay for the blower motor only operates the high speed function. The lower speeds are operated by means of the blower motor speed resistor.
The fuse. The blower motor speed resistor. The blower motor relay. The blower motor switch. Check for power at the blower motor connection.
Not knowing what year S10 you have, you can generally find the blower motor high speed relay nearby the blower motor on the firewall. The resister for the other lower speeds is also found close by the blower motor.
behind the glove compartment, to the left
The 1989 Honda Accord blower motor relay switch can be found on the firewall in the engine compartment. The blower motor relay switch will be on the passenger side of the firewall.
the blower motor relay is located next to the blower motor it is connected to the motor by a purple and black wires
Swap the relay with a known good one, many of the relays are of the same part number. Keep in mind that the blower motor relay only controls the high speed function. The blower motor speed resistor and the blower motor switch controls the lower speeds.
The high speed relay for the blower motor would be found under the hood, on the passenger side of the firewall, close to the blower motor speed resistor.
You can locate your blower motor relay switch by looking at the diagram in a service manual. The blower motor relay switch should be below the dashboard on the passenger side of the passenger compartment.
You can find the 2004 Nissan Maxima blower motor relay switch beneath the passenger side dashboard. The blower motor relay switch will be behind the glove compartment.
The 1998 Rav 4 blower motor relay switch is located in the engine compartment on the firewall. The blower motor relay switch will be on the passenger side of the firewall.
The 1995 Oldsmobile Aurora blower motor relay switch is located beneath the dashboard on the passenger side. The blower motor relay switch should be labeled as such.
The 1995 Ford Explorer blower motor relay switch can be found in the fuse box. The blower motor relay switch will be in the third column, second from the top.