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Home >> Dodge and Ram >> 1996 >> Caravan Base, 3.3 R >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Controls - Tests W/Codes - 2.4L) >> Trouble Code Tests >> Test TC-14A - Radiator Fan Control Relay Circuit
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Test TC-14A - Radiator Fan Control Relay Circuit

WARNING: This page is about a different variant/trim than selected.
NOTE: Radiator fan control relay may be referred to as radiator fan relay.
NOTE: For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY  . For wiring diagram, see WIRING DIAGRAMS - 2.4L article.
  1. Using scan tool, actuate radiator fan control relay. If both radiator fans are cycling on and off, go to next step. If both radiator fans do not cycle on and off, go to step 6).
  2. Conditions required to set DTC are not present at this time. DTC may be stored in Powertrain Control Module (PCM) if an open or shorted circuit exists in radiator fan control relay circuit. Possible causes are: defective radiator fan control relay, fused B+ circuit open, radiator fan control relay wiring circuit open or shorted, defective PCM, defective connector terminals or wiring. Go to next step.
  3. Check for defective wiring or connections at radiator fan control relay, PCM and fused battery voltage wiring to radiator fan control relay. Radiator fan control relay is located near driver's side frame rail and air cleaner lower mount. See Fig 1 . The PCM is located between driver's side front fender and power distribution center, near battery.
    Fig 1: Identifying Radiator Fan Control Relay
    G95I35046
  4. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no defective wiring or connections exist, go to next step.
  5. Wiggle harness from radiator fan control relay to the PCM while radiator fan control relay is still actuated and radiator fans are cycling on and off. If radiator fan operation was interrupted, repair wiring harness. Perform TEST VER-2A. If radiator fans continued to cycle on and off, see INACTIVE TROUBLE CODE CONDITION  .
  6. Using external voltmeter, backprobe terminal No. 3 (Dark Green wire) on connector at radiator fan control relay with radiator fan control relay still actuated. Radiator fan control relay is located near driver's side frame rail and air cleaner lower mount. See Fig 1 .
  7. If voltage does not cycle from no voltage to battery voltage, go to next step. If voltage cycles from no voltage to battery voltage, repair or replace radiator cooling fans or wiring from radiator fan control relay to radiator cooling fans as necessary. Perform TEST VER-2A.
  8. Disconnect connector from radiator fan control relay. Radiator fan control relay is located near driver's side frame rail and air cleaner lower mount. See Fig 1 .
  9. Using scan tool in voltmeter mode, check voltage at terminal No. 4 (Gray wire) on connector for radiator fan control relay. If voltage is more than 10 volts, go to step 11).
  10. If voltage is 10 volts or less, repair open circuit in Gray wire to radiator fan control relay. Ensure radiator fan fuse No. 4 in power distribution center is okay. Power distribution center is located in engine compartment, near battery. Perform TEST VER-2A.
  11. Ensure ignition is off. Using scan tool ohmmeter mode, check resistance at terminal No. 1 (Black wire) on connector for radiator fan control relay. If resistance less than 5 ohms, go to next step. If resistance 5 ohms or more, repair open circuit in Black wire between radiator fan control relay and ground. Perform TEST VER-2A.
  12. Ensure ignition is off. Disconnect Gray connector from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
  13. Using scan tool in ohmmeter, check resistance at PCM connector terminal No. 73 (Light Green/Dark Blue wire). If resistance is less than 5 ohms, repair short to ground in Light Green/Dark Blue wire between PCM and radiator fan control relay. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
  14. Using external ohmmeter, check resistance between terminal No. 2 (Light Green/Dark Blue wire) on connector for radiator fan control relay and PCM connector terminal No. 73 (Light Green/Dark Blue wire). If resistance is 5 ohms or more, repair open circuit in Light Green/Dark Blue wire between PCM and radiator fan control relay. Perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
  15. Reinstall connector on radiator fan control relay. Connect jumper wire to PCM connector terminal No. 73 (Light Green/Dark Blue wire). Momentarily touch other end of jumper wire to ground and note if radiator cooling fans operate.
  16. If radiator cooling fans operate, replace PCM. Perform TEST VER-2A. If radiator cooling fans do not operate, replace radiator fan control relay. Perform TEST VER-2A.
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