MysteryReader

Initially, I believed the issue was to the housing of the third brake light in my first G80. I tapped on it, and it seemed somewhat loose. Another item to verify! In actuality, it might be any of the plastic components located there.

Glad to hear everything worked out, @CarCollector! Sounds like Sivalyn Group has a solid reputation. I’ve been eyeing some of their equipment listings too, and this thread has definitely boosted my confidence in going ahead with a purchase. Thanks for sharing your experience!

I don't think you're missing anything.. Its just those locations are not used in your particular model and trim..

The picture depicts a 1087 560SEC fuse box, hence certain elements may vary between the two. This picture depicts my 2001 SEC, which varies somewhat from my 1987 model and your 1991 one.

Furthermore, if this were my SEC mine, I would substitute all the fuses with new copper/brass element fuses, since the existing aluminum/brass connection interface is prone to deterioration over time due to the different metals. Procure many of the 30A strip fuses as well. They deteriorate due to aging, as I have seen.

In addition to the valuable counsel provided by both Tusabes and Ian, I would like to note that the low-speed fan is activated by the A/C pressure switch S32 located on the receiver/drier. The air conditioning unit is not producing cold air, possibly owing to the low refrigerant levels you mentioned, in conjunction with the low-speed fan operation. Low speed will not function with insufficient refrigerant. One may evaluate the low-speed fan components by bridging the vehicle harness connections at X (S32/2). An ordinary automotive blade fuse will be enough. When the ignition is activated, the low-speed fan should function.