Side mirror control switch repair

I love little fix it jobs like this. I once had a similar problem with the 4 way toggle switch for the mirrors in my 91 Mustang. Although the reasons for the intervention were different than yours (I had spilled a bit of pop on the center console and I had not realized the spill had reached so deep into the switch until it stopped working).

After dismantling and cleaning the parts I found I needed to make a few little wire jumpers to bridge some areas where the cola had eaten away the circuits on the small board.

That repair lasted a dozen years... and it was still working on the day the driver of the Chevy Blazer decided to run the red and T-Bone it...

Sorry about your Mustang but luckily you survived. My wife's brother sold his 1968 Shelby Mustang a few years ago for a totally outrageous amount. Were only 9 of them remaining at the time.

Next door neighbor (a PhD) did almost the same as you with his Saab. Spilled his light and sweet coffee into the center console. Saab wanted something in the range of $1200 to replace all the components so he asked for my help. Stripped the whole thing down and took all the modules to soak in warm water. Rinse and when possible, open all accessible components to dry out. Left to bake in the sun for the afternoon and then reassemble. Good as new and still working.