94 Corolla - Blower Motor has only 1 speed

[jim511]

1994 Corolla and the blower motor only works on low speed. No brainer, right? Somewhere along the way the high blower relay went and also the resistor block (for speeds 2 &3). Nope! replaced them both, still the same

Got to now assume it must be the switch itself. Anyone else run into this?

Thanks,

[speedy25]

I would assume your assumption too. Resistor failure makes the low speeds not work. Having one speed proves the fan works.

It can also be a wiring problem.

-SP

[Polar57]

My 90 Pickup blower speeds narrowed down to slow, 2, slow, and slow. But with the temperatures here near 100, I needed high. I checked the resistors and they're all good, so it's probably the switch. To bypass the switch and get only high working, I pulled the plug from the resistors, then put a jumper across two wires. I used a piece of steel from an old wiper blade because it fits nice and snug into the plug.