Just purchased a '98 SUS and replaced engine. Running well but there is a rythmic clicking from under dash and fans operate when ignition is on.
Saw this once on a '95 Legacy when an under dash diagnostic connector was plugged in by new owner thinking that every connector should be connected.
Unplugging it brought operation back to normal.
On this '98, however, I have been unable to find any connected yet that should not be, as in the green connectors near the center console side.
Any suggestions appreciated.
Alan
Update: No check engine light.
But found two corroded fuses in main panel and one blown fuse in under hood panel
Once replaced, all is well. Thanks!