Test A: No Communication With Front Electronic Module
- Turn ignition switch to LOCK position. Remove and inspect battery junction box fuses No. 2 (10-amp) and No. 11 (15-amp). If either or both fuse(s) are blown, replace fuse(s). If fuses are okay, turn ignition switch to RUN position and measure voltage between battery junction box fuses No. 2 input side and No. 11 input side and ground. If all voltages are 10 volts or more, install fuses and go to next step. If any voltage is less than 10 volts, repair open in battery junction box power supply circuit(s). See POWER DISTRIBUTION article in WIRING DIAGRAMS. Clear DTCs and repeat FEM self-test.
- Turn ignition switch to LOCK position. Disconnect Front Electronic Module (FEM) harness connectors C190 (12-pin) and C346 (20-pin). See Figure . Measure voltage between ground and FEM harness connector C346 terminal No. 1 (Light Blue/Red wire). See Figure . Measure voltage between ground and FEM harness connector C190 terminal No. 6 (Red wire). See Figure . If either voltage is less than 10 volts, repair open in Light Blue/Red wire or Red wire. If both voltages are 10 volts or more, go to next step. Clear DTCs and repeat FEM self-test.
- Disconnect FEM harness connector C192 (17-pin). Measure resistance between ground and FEM harness connector C190 terminal No. 12 (Black wire). Measure resistance between ground and FEM harness connector C192 terminals No. 11, 13, 14 and 15 (all Black wires). See Figure . If all resistances are less than 5 ohms, repair module communications. See MODULE COMMUNICATIONS NETWORK - WINDSTAR article. If any resistance is 5 ohms or more, repair open in Black wire(s). Clear DTCs and repeat FEM self-test.