Symptom Checks

Check the following items:

• Ensure all accessories, A/C and defroster are off, and engine is cooled (so cooling fan would not normally come on). Start engine. Check electric cooling fan. If cooling fan runs continuously, check wiring harness to cooling fan. Check wiring harness to A/C high pressure switch (on 2-speed cooling fan applications) or A/C pressure sensor.
• If cooling fan still runs continuously, start engine and allow to idle. Using scan tool, select ACP PID. If PID value indicates OPEN, go to CIRCUIT TEST KF, step 65) in appropriate article:

For Contour & Mystique 2.0L, see TESTS W/CODES - 2.0L .

For Contour & Mystique 2.5L, see TESTS W/CODES - 2.5L .

For Windstar, see TESTS W/CODES .

• If PID value indicates CLOSED, with engine running at idle, disconnect A/C high pressure switch. Again, using scan tool, view ACP PID. If PID value still indicates CLOSED, check for short to ground in ACPSW circuit. See appropriate wiring diagram in appropriate article:

For Contour & Mystique 2.0L, see WIRING DIAGRAMS - 2.0L .

For Contour & Mystique 2.5L, see WIRING DIAGRAMS - 2.5L .

For Windstar 3.0L, see WIRING DIAGRAMS - 3.0L .

For Windstar 3.8L, see WIRING DIAGRAMS - 3.8L .

If circuit is not shorted to ground, check A/C high pressure switch operation. Also, check for overcharged A/C system.