Hello! My name is Nick. Thank you for taking the time to view this thread!

I have a 1983 Mercedes 300cd
When I bought it the AC did not work and the compressor was not hooked up.
The blower motor would not work at all.
The fuse box had a 25A blue fuse in the #8 spot feeding the blower motor.
This seemed to burn up one of the fuse housing clips, so i moved the #8 wires over to the fresh #5 location and installed the proper 16A fuse.
Still, I had no response from the AC controls!!
SO I opened up the AC control box to find that some of the copper connections were black and burnt.
At that point I purchased a new control box from a user here for the price of $75.
While it was coming in the mail i soldered some wires onto the burnt up control box.
I unhooked the blower motor and then tested the soldered up setup.
It promptly burnt up one of the soldered wires perhaps because it was simply too thin.

My Question:
Is there any advice you would suggest rather than just hooking up the new control box and trying it.
Such as: testing something in particular for a short?
It burnt up my soldered wire with the blower motor unhooked so I am thinking the blower motor could be ruled out as a source of the problem here.
Any type of checklist you would go through in my situation would be appreciated!





new