Coolant fan fried, replaced but now runs constant even with ignition off. on 1994 Ford Taurus

"questionable" repair history before i started looking at it. Old fan motor was slightly melted as was the 3-pin plug. When battery is disconnected, there is a direct short between the blue / hot wire and ground. Add 12v to it and it doesn't show a short (naturally) but the neg wires going to the chassis do get hot quickly. The entire harness coming down from the Relay was amazingly rock hard but after separating all the wires, none were melted through with metal to metal contact... and still the short is there. And i have disconnected the plug to the relay to isolated that. Any next best guess as to where to look or maybe how to bypass part of the harness? Thanks

by in Albuquerque, NM on August 09, 2011
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1 answer
ANSWER by , August 09, 2011
The reason it failed in the first place was it probably ran all the time. There are 5 engine options that year. For fan test procedures and a wiring diagram Autozone have some popular workshop manuals for free on line once you register (for free) on their website There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate