Test A: No Communication With Remote Anti-Theft Personality Module
- Turn ignition switch to LOCK position. Check condition of Central Junction Box (CJB) fuse No. 20 (7.5-amp) and Battery Junction Box (BJB) fuse No. 9 (20-amp). If fuses are okay, go to next step. If fuse are not okay, replace fuse. Recheck system operation. If fuse fails again, check for short to ground in appropriate circuit and repair as necessary. See POWER DISTRIBUTION article in WIRING DIAGRAMS.
- Disconnect RAP module 22-pin harness connector C338. RAP module is located behind left rear quarter panel. Measure voltage between ground and RAP module harness connector C338 terminal No. 12 (White/Light Blue wire). See Fig 1 . If more than 10 volts exists, go to next step. If 10 volts or less exists, repair open in White/Light Blue wire or Light Blue/Orange wire between RAP module and BJB. Recheck system operation.
- Disconnect RAP module 26-pin harness connector C336. Turn ignition switch to RUN position. Measure voltage between ground and RAP module harness connector C336 terminal No. 25 (Black/Pink wire). See Fig 2 . If more than 10 volts exists, go to next step. If 10 volts or less exists, repair open in Black/Pink wire between RAP Module and CJB. Recheck system operation.
- Turn ignition switch to LOCK position. Measure resistance between ground and RAP module harness connector C338 terminal No. 14 (Black/White wire). See Fig 1 . If resistance is less than 5 ohms, repair module communications concern. See MODULE COMMUNICATIONS NETWORK - EXPLORER & MOUNTAINEER article. If resistance is 5 ohms or more, repair open in Black/White wire between RAP module and ground. Ground point is located in left front of engine compartment, near radiator. Recheck system operation.