Did the old radio have some kind of “can bus” cable?
If so, that would be my guess.

A lot of the modern vehicles have all electronic components tied together and the radio may need programming to reestablish comms.

I don’t know squat about these systems.

I understand that it is too much crap for a car for me.
I know GM had a lot of these issues too in their trucks and suv’s…I’m sure Dodge had their share as well.

Might try a radio install shop for advice.

Last edited by Nos681 (7/12/2022 4:44 AM)

I would google the issue along with your exact model and options (auto climate control, etc. if equipped).  What I've found with issues like this is typically others have experienced the same thing and there are forums for just about every make, model, etc. where problems are discussed. 

seems that the resistor module was bad, tasted the fan motor as suggested, it seems to be fine, so i replace the resistor module. i will find out tomorrow

further research shows that the factory connector for the resistor module could be burnt, looking forward to looking at that tomorrow..
 

val fulesday wrote:

i have a problem with my A/C on my 2011 f150 . the blower all on it's own slows way down, up still can feel wisp of cool or cold air, then it will start picking up speed again all on it's own. about 6 weeks ago i installed a new radio and CD player, it never happened before that, and this issue just started. getting ready for a 700 mile road trip, here in west texas it sure would be nice to have it fixed for that trip. 

I know on my 2017 Explorer, when I use the phone, the fan speed is automatically slowed to cut down on the noise level. Maybe your radio has that function?