LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 1999 >> Taurus SHO >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Module Communications Network System >> System Tests >> Test L: No Module/Network Communication
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Test L: No Module/Network Communication

NOTE: After making any repair, perform data link diagnostic procedure. See DATA LINK DIAGNOSTIC TEST  under SELF-DIAGNOSTIC SYSTEM.
  1. Turn ignition switch to LOCK position. Inspect NGS tester connector for loose, damaged or corroded terminals. If connector is okay, go to next step. If problem exists, repair connector as necessary.
  2. Inspect Data Link Connector (DLC) for loose, damaged or corroded terminals. If connector is okay, go to next step. If problem exists, repair connector as necessary.
  3. Turn ignition switch to LOCK position. Remove and inspect fuse No. 25 (10-amp) from instrument panel fuse box. If fuse is okay, install fuse and go to next step. If fuse is blown, replace fuse and retest system for normal operation. Recheck fuse. If fuse is blown, repair short to ground in Light Green/Red wire between instrument panel fuse block and DLC.
  4. Measure voltage between ground and terminal No. 16 (Light Green/Red wire) at DLC. See Figure . If battery voltage exists, go to next step. If battery voltage does not exist, repair Light Green/Red wire between instrument panel fuse box and DLC.
  5. Measure resistance between ground and terminals No. 4 (Black wire) and No. 5 (Blue/Orange wire) at DLC. If both resistance readings are 5 ohms or less, repair or replace NGS tester. If any resistance reading is more than 5 ohms, repair open in Black wire and/or Blue/Orange wire between ground and DLC.
scientia non olet · About LEMON Manuals