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Intermittent Wipers Inoperative

  1. Connect scan tool to Data Link Connector (DLC) 16-pin connector. See COMPONENT LOCATIONS  . Turn ignition switch to ON position. If scan tool display is not blank or have a CCD bus failure message, go to next step. If scan tool display is blank or has a CCD bus failure message, see COMMUNICATIONS in SYMPTOM INDEX DIRECTORY  table.
  2. Turn ignition switch to ON position. Using scan tool, monitor I_WIPER ENABLE state. Turn intermittent wipers to any speed setting. If scan tool displays I_WIPER ENABLE state voltage of more than 7.9 volts, go to next step. If reading is 7.9 volts or less, go to step  10 .
  3. Turn ignition switch to OFF position. Remove wiper relay from Power Distribution Center (PDC). Connect a test light between battery voltage and wiper relay cavity for relay terminal No. 85 (Yellow/Dark Green wire) of PDC. While monitoring test light, actuate intermittent wiper operation. If test light flashes on and off, go to next step. If test light does not flash on and off, go to step  8 .
  4. Turn ignition switch to OFF position. Measure resistance across terminals No. 85 and 86 of wiper relay. If resistance measures 70-80 ohms, go to next step. If resistance does not measure between 70-80 ohms, replace wiper relay. Perform BODY VERIFICATION TEST  . Retest intermittent wiper operation.
  5. Turn ignition switch to ON position. Measure voltage between ground and PDC terminal cavity for wiper relay terminal No. 86 (Dark Blue wire). If reading is more than 10 volts, go to next step. If reading is 10 volts or less, repair open in Dark Blue wire between PDC and Junction Block (JB) fuse No. 6 (20-amp). Perform BODY VERIFICATION TEST  . If fuse No. 6 (20-amp) is open, replace fuse.
  6. Measure voltage between ground and PDC terminal cavity for wiper relay terminal No. 87 (Dark Blue wire). If reading is more than 10 volts, go to next step. If reading is 10 volts or less, repair open in Dark Blue wire between PDC and Junction Block (JB) fuse No. 6 (20-amp). Perform BODY VERIFICATION TEST  . If fuse No. 6 (20-amp) is open, replace fuse.
  7. Turn ignition switch to OFF position. Disconnect multifunction switch connector. Using a fused jumper wire, connect cavities of PDC for wiper relay terminals No. 30 and 87. Turn ignition switch to ON position. Measure voltage between ground and multifunction switch harness connector terminal No. 7 (Red/Black wire). Measure voltage between ground and multifunction switch harness connector terminal and No. 8 (Red/Black wire). If either reading is less than 10 volts, repair open in wiper relay output circuit (Red/Black wire) between multifunction switch, Junction Block (JB) and PDC cavity for wiper relay terminal No. 30. Perform BODY VERIFICATION TEST  . If reading is 10 volts or more, replace multifunction switch. Perform BODY VERIFICATION TEST  . See appropriate STEERING COLUMN SWITCHES article.
  8. Turn ignition switch to OFF position. Disconnect CTM connector C1. On base-line models, measure resistance between CTM connector C1 terminal No. 3 (White wire) and multifunction switch connector terminal No. 1. On high-line models, measure resistance between CTM connector C1 terminal No. 12 (White wire) and multifunction switch connector terminal No. 1. On all models, if resistance is more than 5 ohms, repair open in White wire. Perform BODY VERIFICATION TEST  . If resistance is less than 5 ohms, go to next step.
  9. Turn ignition switch to OFF position. Inspect wiring harness for damage and intermittent short to ground. Inspect connectors for damage and good terminal contact. Repair connectors as necessary. If wiring and connectors are okay, and fault condition remains, replace CTM. Perform BODY VERIFICATION TEST  .
  10. Turn ignition switch to OFF position. Disconnect CTM connector C1. Turn ignition switch to ON position. Turn wiper on to any intermittent wiper speed setting. On base-line models, measure voltage between ground and CTM connector terminal No. 14 (Dark Green/Red wire). On high-line models, measure voltage between ground and CTM connector terminal No. 3 (Dark Green/Red wire). On all models, if reading is more than 7.9 volts, replace CTM. Perform BODY VERIFICATION TEST  . If reading is 7.9 volts or less, go to next step.
  11. Turn ignition switch to OFF position. Disconnect multifunction switch connector. On base-line models, measure resistance of Dark Green/Red wire between multifunction switch and CTM connector terminal No. 14. On high-line models, measure resistance of Dark Green/Red wire between multifunction switch and CTM connector terminal No. 3. On all models, if reading is less than 5 ohms, replace multifunction switch. If reading is 5 ohms or more, repair open in Dark Green/Red wire. Perform BODY VERIFICATION TEST  .
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