Okay. I suspect you have an issue with the TIPM not supplying power but we need to prove out the rest of the system.
Do you know how to jump power to the blower motor? Basically, you want to take battery voltage and supply it to your DB wire just long enough to test the different fan speeds. If you let this run for more than a minute or two, it can burn up your motor because it is not a protected circuit.
If you put the fan on speed setting one, then turn the ignition on, jump your 12 volts to the DB wire and the fan should come on low. Then check each fan speed. If each works properly then you just confirmed that your motor, resistor, and AC/heat module are functioning.
This means you have a voltage supply issue. So it is either the supply module (TIPM) or the wiring in between. At this point, you will want to take the wiring and measure resistance from the TIPM to the blower motor. You do this by disconnecting the circuit at both ends, set your meter to ohms and probe the circuit from both ends. You should have less than 0.5 ohms. If you have a wiring issue, I suspect this will be open or infinite resistance. Let me know the results of this and what that resistance reading is.
Saturday, May 11th, 2019 AT 12:24 PM