Head unit installation issue?

Hi,

Have you first checked fuses for the blower motor? Also, which lights are acting odd? What are they doing?

First, check the fuses. I attached a pic below identifying three different ones for the blower motor to operate.

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If they are all good and have power, I suspect you damaged a ground wire while working under the dash. If you look at pic 2 below, it shows a ground we need to check. It is G203. See pic for location.

Start with this and let me know what you find.

Joe

See pics below.