A/C Works - Fan doesn't - Any suggestions?

[deosingh]

I have an 1989 240 N/A. When I slide the fan switch to the 1, 2, 3, or 4 position, it doesn't seem to work whether the A/C button is on or off. I think the A/C still works because when I hit the A/C button, I can hear the A/C fan turn on and the button light turns illuminates.

Also, while I'm driving, if I hit a bump and the fan slider switch is in the 1, 2, 3 or 4 position, it turns on blowing air for a short time, then turns off until I hit another bump. Similarly, if I hit a bump and the fan slider switch is in the 1-4 position and the A/C button is on, cold air is blown out of the vents.

This indicates to me a loose connection somewhere, but I don't know where to start looking? Anyone have any advice or an electrical schematic that would be helpful?

Thanks.

[ur2nrvs]

Have you checked the fuses under the hood? Your wires might be melted together and shorting itself out. Just a suggestion though.

[deosingh]

Yah... check the fuses. Things look good there. I'll double check the wires though. Could this be a switch relay issue?

Have you checked the fuses under the hood? Your wires might be melted together and shorting itself out. Just a suggestion though.

[slyedog240sx]

relay or blower motor itself may be going bad.

[deosingh]

does anyone have an electrical schematic of the cooling system that they can post?

not sure where to look to find the relay or blower to troubleshoot.

[positron1]

The blower is located behind the glovebox.The white thing with the plug coming out of it is your blower motor resistor.

[italia16]

I had a similar problem with my 95 240SX. The air would not blow unless the dial was in position 4. I replaced the blower resistor for $25 and it solved the problem. Good luck.