Blower motor wont turn off

[AuroraGirl]

It runs constantly in my 83 k10 with an 85 interior harness. The off position is slower than Low, but it still runs. I only drive my truck in the summer so I just unplugged the harness from the blower resistor on the firewall. If I ever want heat a couple minutes plugging it back in is all it takes.

Prob have a bad relay or something
1982 the feature to turn off the fan came out.

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