2006 Hummer H3 No blower fan on any speeds

2006 Hummer H3. Came in with no blower on any speeds. Customer suspected faulty blower motor. They said they smacked it and it worked for a few days. Nice, quick and easy video going through the simple testing to rule out the cause without any guessing.
On these issues I like to start by putting a high current test light across the blower connector and just seeing if I have a faulty blower. On this vehicle the blower connector is a little harder to get to. But the resistor connector and the high speed blower relay connector are very easy to get to. Looking at the wiring diagram I see that I can do all my testing from those two. No need to check fuses when you have easy access to the components!