E30 electrical issues

[1986 e30redbaron]

Hello all and good day to you .

I recently had my air-con fixed by my mechanic . On a recent trip looks like my aircon belt broke . I head a ruckus while driving 70 mph and the air stopped being cool , but the blower was still working . Lights of cool and hot temp switch lighted up when pressed .

About a week later my cluster , fuel , tac , economy , temp gauge stopped working , then I noticed the blower stopped working too .

At some point before I noticed the Guage stopped working I had removed my hirschman power antenna to replace a broken mast .

Today I noticed my power mirrors are not working either ...

I have replaced fuse 10 , 20 and 27 . Looking to replace K7 relay .

What I am wondering is , did I mess electrical stuff up when I removed the antenna with out undoing the battery (((

Did it all happen serendipitously : SI batteries might have gone dead? Did my blower simply stopped working because of the fan belt breakage .

I am planning on removing the cluster to replace the odometer gears , since they have been slipping , once I do that I can check and replace si batteries if needed . Hoping that will fix my cluster issues .

What would be best way of trouble shooting blower issue , and mirror issue ?

Any suggestions or help appreciated .
Good day


Bmw1986 manual 325.

[1986 e30redbaron]

Update : removed cluster and found two scrapes on my SI board where the front screws are on the trim . I also discovered that a previous mechanic was smart and removed the batteries and seems like he jumped a cable to power the board . But looks like I may have to replace the board al together since some of the ribbons on the board it self are broken due to the screws scraping it and me tapping on the cluster to make gauges work ... awww snap.