Standing at passenger side, looking towards rear of block, just below header and in between plugs. I found this single wire broken, looks as if it goes into a nearby plug which goes into the block.

Any ideas?

 

Fan Switch - it turns on the elctric fan when it reaches preset temp.

 

Thank you sir. I've been having fan issues for a long time. Ended up doing Willie's dual fan mod to get around it.

I'll have to look at some wiring diagrams to figure out whether it grounds the primary or the secondary. Can't remember how that all worked.