Blower motor quit working installed new one still does not work

Hello, sorry to hear about your issue, does your car have automatic A/C? Such as you can set a certain temperature in the car or does it just have a dial for hot and cold? And can you please get me the VIN number, so I can find the correct system.

So this should be the correct model, you should have battery power on the red wire, the grey wire is the control wire going to the heater and A/C programmer. Start by checking this 50amp fuse labeled INDVERT. It should be in the engine compartment fuse box. Its a big maxi fuse. Make sure its not burnt and check that red wire at the blower for power.

The black wire at the blower is the ground wire, you can check this by hooking a test light to battery positive and touch the black wire, if the ground is good the light will light up. Or you can use a multi-meter and do the same thing, battery positive and touch the black wire, you should read battery power.

Okay, so here is your next test: set the blower on low setting and recheck the grey wire at the blower for any voltage, (so we know you're probably not going to see any). If no voltage you need to find the "Heater and A/C programmer" It's on the right side of the dash board behind the glove box. And recheck the grey wire coming directly out of the Programmer. If still nothing with the blower switch on Lo, then either the programmer has failed or its missing a power or ground. You can identify the programmer by its wire coloring and order.

It's the grey wire at the programmer pin C6 labeled "Lo Temp Sens".
Now if you have no power on the grey wire, you will need to check all the powers and grounds for the programmer, before condemning it. You have.22 volts coming directly out of the programmer? You should have 9 volts on Lo. Is anything else in the car not working? Any check engine light?

Go by the wiring colors to make sure it's the right module, like this, the first 2 are grey, next light blue, then light green/white, etc. Those 2 first grey wires should be 5 volts, that's the reference circuit. We have to make sure the module has all the proper powers and grounds, that's why this is so important.

Here's everything you need to check at the Programmer Module, in the 1st picture, all the time battery power coming in on C3 orange wire, ignition power going out 3 light green wires, and a ground black/white wire. Same as 2nd picture, its all labeled for you. The 2 wires at the top ones grey the others green are very important that they both have 5 volts with the key on or running.

According to this it actually seems to be above the gas pedal, behind the head unit. I'm not sure why they're giving different locations for this thing.

Here's the relearn procedure if you determine you need to replace the Heater and A/C programmer. Let me know what you find out tomorrow.

It's my pleasure, I'll be available tomorrow to help you as well. I know it's a lot to take in and think about, that's why we have to go through so much training. Have a good night. Cheers.

Does this car have a screen where you can select different options? I'm reading here that it might have its own on board diagnostics. This is the plug you should see on the back of the heater and A/C programmer. The D3 pin is the grey wire for the blower motor control. There is another grey wire there too so make sure its the right one. And check C3 orange wire for Battery +, and D1 Lt Green Battery + with key on. The heater and A/C programmer is right under the radio.

How do I find my Cadillac code?
How to Check Car Codes in Cadillac Cars
1. Put the key into the ignition and turn it to the "on" position.
2. Locate the Driver's Information Center labeled on the control panel..
3. Let go of the buttons when you see text appear on the Driver's Information Center.
4. Press the up or down arrow buttons to scroll through the trouble codes.

This is how youre supposed to be able to run On board diagnostics. If it works, ive never tried this. Usually we just use a scan tool for this type of thing.