LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Dodge and Ram >> 2000 >> Caravan Base, 2.4 B >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Modules >> System Tests >> Communications >> Bus Short To 5 Volts
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Bus Short To 5 Volts

NOTE: After making any repairs, perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
  1. Turn ignition off. If vehicle is not equipped with Transmission Control Module (TCM), go to next step. If vehicle is equipped with TCM, disconnect TCM located in engine compartment on right fenderwell. Turn ignition on. If scan tool does not display BUS SHORT TO 5 VOLTS, replace TCM. If scan tool displays BUS SHORT TO 5 VOLTS, go to next step.
  2. Turn ignition off. Disconnect Powertrain Control Module (PCM). PCM is located in engine compartment between left inner fender and power distribution center. Turn ignition on. If scan tool does not display BUS SHORT TO 5 VOLTS, go to step  20 . If scan tool displays BUS SHORT TO 5 VOLTS, go to next step.
  3. Turn ignition off. Disconnect CCD radio Black 2-pin connector from back of radio. Turn ignition on. If scan tool does not display BUS SHORT TO 5 VOLTS, replace radio. If scan tool displays BUS SHORT TO 5 VOLTS, go to next step.
  4. Turn ignition off. If vehicle is not equipped with Compass/Mini-Trip Computer (CMTC), go to next step. If vehicle is equipped with CMTC, disconnect CMTC located behind overhead console. Turn ignition on. If scan tool does not display BUS SHORT TO 5 VOLTS, replace CMTC. If scan tool displays BUS SHORT TO 5 VOLTS, go to next step.
  5. Turn ignition off. Disconnect Controller Anti-Lock Brake (CAB) module. CAB module is located on right side of engine compartment and has a Black 25-pin connector. Turn ignition on. If scan tool does not display BUS SHORT TO 5 VOLTS, replace CAB module. If scan tool displays BUS SHORT 5 VOLTS, go to next step.
  6. Turn ignition off. Disconnect instrument cluster. Turn ignition on. If scan tool does not display BUS SHORT TO 5 VOLTS, replace instrument cluster. If scan tool displays BUS SHORT TO 5 VOLTS, go to next step.
  7. Turn ignition off. Disconnect Heating/Ventilation Air Conditioning (HVAC) module. HVAC control module is part of heating-A/C control assembly in center of instrument panel. Turn ignition on. If scan tool does not display BUS SHORT TO 5 VOLTS, replace HVAC module. If scan tool displays BUS SHORT TO 5 VOLTS, go to next step.
  8. Turn ignition off. Disconnect Body Control Module (BCM) connectors. BCM is located with junction block under driver's side instrument panel. See Figure . Turn ignition on. If scan tool does not display BUS SHORT TO 5 VOLTS, go to step  12 . If scan tool displays BUS SHORT TO 5 VOLTS, go to next step.
  9. Turn ignition off and wait 2 minutes for air bag system back-up power source to discharge. Disconnect Air Bag Control Module (ACM) 13-pin connector. ACM is located under center of instrument panel. Turn ignition on. If scan tool does not display BUS SHORT TO 5 VOLTS, replace ACM. If scan tool displays BUS SHORT TO 5 VOLTS, go to next step.
  10. Turn ignition on. Measure voltage between ground and terminal No. 3 (Violet/Brown wire) at BCM connector "A". See Figure . If voltage is more than 4 volts, repair short to voltage in Violet/Brown wire. If voltage is 4 volts or less, go to next step.
  11. Measure voltage between ground and terminal No. 34 (White/Black wire) at BCM connector "A". If voltage is more than 4 volts, repair short to voltage in White/Black wire. If voltage is less than 4 volts, replace scan tool cable or scan tool as necessary.
  12. Turn ignition off. Measure resistance between terminal No. 3 (Violet/Brown wire) at BCM connector "A" and terminal No. 78 (Light Green/Red wire) at BCM connector "B". See Figure . If resistance is less than 5 ohms, Violet/Brown wire and Light Green/Red wire are shorted together. Repair wiring as necessary. If resistance is 5 ohms or more, go to next step.
  13. Measure resistance between terminal No. 34 (White/Black wire) at BCM connector "A" and terminal No. 78 (Light Green/Red wire) at BCM connector "B". If resistance is less than 5 ohms, White/Black wire and Light Green/Red wire are shorted together. Repair wiring as necessary. If resistance is 5 ohms or more, go to next step.
  14. Measure resistance between terminals No. 3 (Violet/Brown wire) and No. 32 (Light Blue wire) at BCM connector "A". If resistance is less than 5 ohms, Violet/Brown wire and Light Blue wire are shorted together. Repair wiring as necessary. If resistance is 5 ohms or more, go to next step.
  15. Measure resistance between terminals No. 32 (Light Blue wire) and No. 34 (White/Black wire) at BCM connector "A". If resistance is less than 5 ohms, Light Blue wire and White/Black wire are shorted together. Repair wiring as necessary. If resistance is 5 ohms or more, go to next step.
  16. Measure resistance between terminal No. 3 (Violet/Brown wire) at BCM connector "A" and terminal No. 79 (Tan wire) at BCM connector "B". If resistance is less than 5 ohms, Violet/Brown wire and Tan wire are shorted together. Repair wiring as necessary. If resistance is 5 ohms or more, go to next step.
  17. Measure resistance between terminal No. 34 (White/Black wire) at BCM connector "A" and terminal No. 79 (Tan wire) at BCM connector "B". If resistance is less than 5 ohms, White/Black wire and Tan wire are shorted together. Repair wiring as necessary. If resistance is 5 ohms or more, go to next step.
  18. Measure resistance between terminal No. 3 (Violet/Brown wire) at BCM connector "A" and terminal No. 48 (Tan/Red wire) at BCM connector "B". If resistance is less than 5 ohms, Violet/Brown wire and Tan/Red wire are shorted together. Repair wiring as necessary. If resistance is 5 ohms or more, go to next step.
  19. Measure resistance between terminal No. 34 (White/Black wire) BCM connector "A" and terminal No. 48 (Tan/Red wire) at BCM connector "B". If resistance is less than 5 ohms, White/Black wire and Tan/Red wire are shorted together. Repair wiring as necessary. If resistance is 5 ohms or more, replace BCM.
  20. Turn ignition off. Measure resistance between terminals No. 59 (Violet/Brown wire) and No. 61 (Violet/White wire) at Powertrain Control Module (PCM) connector. See Figure . If resistance is less than 5 ohms, Violet/Brown wire and Violet/White wire are shorted together. Repair wiring as necessary. If resistance is 5 ohms or more, go to next step.
  21. Measure resistance between terminals No. 60 (White/Black wire) and No. 61 (Violet/White wire) at PCM connector. If resistance is less than 5 ohms, White/Black wire and Violet/White wire are shorted together. Repair wiring as necessary. If resistance is 5 ohms or more, replace PCM.
scientia non olet · About LEMON Manuals