LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Dodge and Ram >> 2002 >> Caravan EC >> Repair and Diagnosis >> Accessories & Equipment >> Memory Modules >> Body Control Modules >> System Tests >> Vehicle Theft Security System (VTSS) >> Horn Relay Open
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Horn Relay Open

NOTE: After making any repairs, perform VTSS VERIFICATION TEST  under VERIFICATION TESTS.
  1. Turn ignition on. Using scan tool, erase Front Control Module (FCM) DTCs. Turn ignition off. Wait approximately 10 seconds. Turn ignition on. Recheck for FCM DTCs. If HORN RELAY OPEN resets, go to next step. If HORN RELAY OPEN does not reset, system is okay at this time. Check for intermittent poor connections or faulty circuits. See ANTI-THEFT and HORN in appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
  2. Turn ignition off. Locate and disconnect FCM. See FRONT CONTROL MODULE  under REMOVAL & INSTALLATION. Using DVOM, measure voltage between ground and FCM connector terminal No. 10. See Figure. If voltage is 10 volts or less, go to next step. If voltage is greater than 10 volts, replace FCM.
  3. Remove horn relay from Intelligent Power Module (IPM). See Figure. Using DVOM, measure resistance between FCM connector terminal No. 10 and horn relay cavity terminal No. 85. If resistance is 5 ohms or less, replace horn relay. If resistance is greater than 5 ohms, replace IPM.
scientia non olet · About LEMON Manuals