Heater blower switch question

[SREDMONDS51]

I have been working on my 1967 Dodge Coronet RT trying to get my heater blower working. I have replaced the blower motor and had my heater switch rebuilt. I have low speed on the blower motor now but not medium or high. I have ohm the resistor and it shows good. I am wondering if it could be the blower switch. Any help out there?

 

[AR67GTX]

I would suspect it could be the switch - not sure. the fan switch on my 66 up is kind of wonky on med and high speed. If I wiggle it up and down I can usually make connection and get a higher speed but sometimes not. It’s something I need to get back to one day. Actually from your description, if the resister and harness are good there’s not much else it could be.