However now the blower motor works at very very low speed?

Actually they're on the reverse side of the blower motor covers. Two of them, one on each side. I have replaced the covers and resistors plus the right hand side relay. However now the blower motor works at very very low speed, 1 and at full blast, 4. I get nothing at 2 and 3.

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[Kerry at Pelican Parts]

Something must be wrong with the connection at the blower motor resistor

- Kerry