Don't know if its of any help but rebuilding my parts car thats a 91 Se-r manual I pulled a fan from a 99Se-l auto. The plug on the 91 was two wire and the plug from the 99 was 4 wire, well after looking at several diagrams i got the break down to correctly wire it. On the 4 wire plug one of them is low speed, one is high speed, one is for the automatic transmission and one the ground. In order to get it to work with the two wire plug I simply wired all the positives together to the one positive on the 91 and the grounds together. Works like a charm. Long story short pretty sure its two wire but 4 can work.