Review on HQRP 4 Position 3 Speed 120V 250V Selector Switch by Matthew Goyette

No documentation, so here for the 15 amp version (style 2) the terminals Psn-4 pin-B are connected to pin-3 pin-B. You will need a magnifying glass to read the pins on the case. I used nail polish to mark the contacts on the case. What I did was put 1,2,3 "dots" with nail polish to represent pins 1,2,3. Then I applied 1.2 "strokes" of nail polish to indicate contacts A, B. After about 5 minutes with a hair dryer they were dry and I could easily tell which contact was which. Also note: the 15 amp version is not secured with a large nut like the 10 amp version. You'll need two small screws to hold it in place (or maybe some hot glue).