[strictlypersonl]

When we prep the unit, we "hide" the low and medium speed wires inside the case. Just connect the remaining wire to the toggle switch to have a single-speed blower.

If you're obsessed with having the other speeds, you'll have to pull the heater out, disassemble it to access the other wires, and use a different switch mounted underneath the dash. I've got the old ones here somewhere.