Scan Tool Blank Screen

Using DVOM, check continuity between ground and terminals No. 4 (Black wire) and No. 5 (Black/Tan wire) on Data Link Connector (DLC). See Figure . Continuity to ground should exist. Repair as needed. Using a DVOM, measure voltage between ground and terminal No. 16 (Tan/Black wire) on DLC. Battery voltage should exist. If battery voltage does not exist, inspect fuse No. 17 in Power Distribution Center (PDC). See COMPONENT LOCATIONS  . Replace as needed. If battery voltage exists, replace scan tool cable or scan tool as necessary. Perform BODY VERIFICATION TEST  under VERIFICATION TESTS.