Cooling Fan comes on with ignition - '87 5kcstqw

[Swann, Benjamin R. (BSWANN)]

This wierdness started just after I changed the coolant hose which goes from
the turbo to the fitting on the freeze plug.  I don't see how this would be
related, except maybe draining and refilling coolant during the operation
has precipitated some sensor to be working incorrectly.

Symptoms - cooling fan comes on with ignition and stays on until ignition is
shut off.  I think it is fan speed 2, but am not sure.  I can hear the fan
running inside the car at idle.   I haven't verified if the fan comes on
when stone cold.   I was looking at the Bentle wiring diagram, but did not
see any direct correlation to ignition directly enabling any sensor to relay
feeds from current track 15 or X track.

I topped off coolant to get any air out of the system, and even ran the
afterrun pump in both directions several times.  Have already taken severa
highway trips, so I don't think there could be any air in the system.  There
are no warning indicators, and the coolant temp doesn't even gets to max
operating temperature - pretty much normal for this time of year.

Any BTDT on this.

TIA

Ben

'87 5kcstqw 
'85 4kcsq