I gotta 90 dx hatchback wit 91 b18 in it... On the back of the motor there the 3 prongs which idk which is which... On the harness there are to lil flugs with white ends and one plug wit a metal end. Im pretty sure its to do wit the fan and the oil gauge becuz if i unplug one the fan one kick in and if i get the fan to kick in the oil light stays on. Can someone get me a pic or help me out.. on the back of the block theres a black circle wit two prongs comin out and under that there is just a single prong by itself.