Engine cooling fan running constantly when ignition is ON or engine running (even when cold)

PAGJAC

MEMBER
1999 FORD ESCORT
105,000 MILES

I made the mistake of accidentally piercing through a wire bunch, which put in contact a black wire directly connected to the battery's positive post and a red wire going to the black box with big fuses in the left part of the engine compartment. I don't know what this red wires powers. Engine runs OK but fan keeps running all the time. I checked the wires, separated and isolated them with tape so they wouldn't touch anymore. I did that BEFORE starting the engine after the piercing incident. It did not have this problem before.

2 Replies

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

You shorted something to power. Double check to see if you can find the wiring that was damaged. I feel power is being supplied to the relay or directly to the fan.

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Saturday, June 6th, 2020 AT 12:45 PM

PAGJAC

MEMBER
2 POSTS

I did a more complete search and identified the wire that was shorted to power. It's a red wire that subdivise in three before going into the black fuse box. The three red wires go like this: one to a 10 amps fuse (left light) one to another 10 amps fuse (right light) and the black relay identified as "Head" (headlight I suppose. No other wire has been shorted.