97 bonneville ssei blower troubles

[Mike25]

Hi all,

My problem is when I turn off my car the exteroir temperature reading stays on and the blower motor on it's own will start running again after 10 minutes (car shut off and locked). I sat in the car once to see what it does and the blower turns on for a while and turns off than repeats. Every morning the battery is dead of course and I am thinking of unplugging the battery every night so it doesn't kill it. I have been reading my manuals over and over to find a solution or get an idea but, so far nothing. I am takeing it in on saturday to get the codes checked but, does anyone have any ideas?

Thanks for any help Mike

[Bassasasin]

Welcome to the forum

Sounds like the PCM.

Possibly the blower control relay.
They control the AC/Heater blower.

You could try disconecting the battery and resetting the computer but that proubably wont help since its circuit is confused.

GOod Luck