Fan relay and sniper install

I believe the diode (which needs to be protected) is used to prevent spike back every time the compressor cycles. 80’s and early 90’s GM cars had them. Every time the compressor shut off the spike would do something to the computer and really mess them up and keep the compressor engaged. The diode was so damaged that gm built a fuse like diode so it could be changed easier to solve warranty costs. It’s been a long time since I worked on those BUT they are needed. In this case it may keep the relay from what I will call fluttering. Flashing on and off.

remember why the computer is connected to the relay(s) so it knows when to raise the idle to compensate for low rpm idle ac clutch engagement.