C 2500 Suburban 2WD V8-454 7.4L VIN J SFI (1998)
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Troubleshooting Hints
1. CHECK condition of AUX PWR Fuse. If Fuse is open, LOCATE and REPAIR source of overload. REPLACE Fuse.
2. CHECK Grounds G103, G104, and G200 are clean and tight.
3. CHECK for 12 volts at terminal 16 (CKT 840) of the DATA LINK CONNECTOR. REPAIR if necessary.
4. CHECK terminal 4, CKT 150 and terminal 5, CKT 451 for continuity to ground. REPAIR if necessary.
DATA LINE(S)
1. Check for proper connection of scan tool to Data Link Connector (DLC).
2. Check for loose or missing terminals at DLC.
3. If VCM/PCM is not accessible with a scan tool, check for an open in PPL (1807) wire between component and DLC terminal 2.
4. If Electronic Brake Control Module is not accessible with a scan tool, check for an open in TAN/WHT (799) wire between component and DLC
terminal 12.
