random orbit

1994 S-10 blower motor has a funny habit of running only sometimes. It's always running smoothly on low with no noise. About 50% of the time all the speeds work fine. The other 50% the blower stay on low, no matter what position the switch is in. Motor appears good and I replaced the resistors with no change. It's cold and I can use a little help narrowing down my problem. Can you help me, please?

OverBoardProject

It has to be a loose wire, or the switch it's self

steve d

I have the same problem!!! If you find out what's wrong let me know. I will do the same! good luck!

BLAZERBOY69

I WOULD DEFINITELY TAKE A CLOSE LOOK AT THE SWITCH, AND THE WIRES THAT CONNECT IT. THE SAME THING HAPPENED ON MY DADS RANGER, AND IT TURNED OUT TO BE THE SWITCH HAD BLOWN, AND A WIRE HAD FRIED RIGHT AT THE SWITCH

Cam1959

Check that motor body has good ground wire connection.

laxman21

Happen to me a few years ago. It was the switch. Replaced it. a week later the blower mooter went.

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'92 s-10 4x4 EC p/u

'99 Blazer LT

'99 Suburban LT