how to hook up mark VIII fan

[brent_cosenza]

I have 2 black wires and a blueish green wire on my mark 8 fan and was wondering how these were hooked up

 

[1990MustangLX50]

1 black wire is not used. I believe its the black on in the middle. Just hook to a battery to check which one is the ground for the motor

 

[Stroked N Blown]

Blue is the pos, blk is grd. Ihavent figured out what the middle is for.

 

[Stroked N Blown]

I am now doing the exact same install as you. I ran into a little trouble after cutting up the fan. I placed the fan into the shroud where I thought the bolts would could be placed. To my surprise the fan hit the pulley. When I placed it back into the shroud I had an area where it was hollow and no bolts could be placed. I think I will have to fab a piece of metal and reinforcement brackets to put in that area. I pm'd the author of the e-fan stickey for advice. Have you run into that yet? Oh, my car is a 1990 and his is a early modle possibly a 84 or 85 and the shrouds are completely different which causes the problems.

 

[battyice]

The Mark VIII fan is two speed. One wire is for low, the other for high, and the third for the ground.