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DTC B2558: Interior Light Control Output Short To Battery: Testing

  1. If BFC diagnostic system check was performed, go to next step. If BFC diagnostic system check was not performed, see procedures in BFC DIAGNOSTIC SYSTEM CHECK  .
  2. Disconnect BFC Pink 24-pin connector C3. Remove left and right courtesy lights. Turn dome switch to OFF position. Using DVOM, check voltage between BFC harness connector C3, terminal A11 (White wire) and ground. If zero volts exists, go to step 10). If zero volts does not exist, go to next step.
  3. Disconnect left I/P wiring harness junction block Brown 68-pin connector C1. Disconnect left I/P wiring harness junction block Gray 30-pin connector C2. Disconnect left I/P wiring harness junction block Black 30-pin connector C3. Using DVOM, check voltage between BFC harness connector C3, terminal A11 (White wire) and ground. If zero volts exists, go to step 5). If zero volts does not exist, go to next step.
  4. Repair short to battery in White wire between BFC connector C3 and left I/P wiring harness junction block connector C1. Go to step 11).
  5. Using DVOM, check voltage between left I/P wiring harness junction block Gray 30-pin harness connector C2, terminal C3 (White wire) and ground. If zero volts exists, go to step 7). If zero volts does not exist, go to next step.
  6. Repair short to battery in White wire between left I/P wiring harness junction block connector C2 and left and right courtesy lights. Go to step 11).
  7. Using DVOM, check voltage between left I/P wiring harness junction block Black 30-pin harness connector C3, terminal C10 (White wire) and ground. If zero volts exists, go to step 9). If zero volts does not exist, go to next step.
  8. Repair short to battery in White wire between left I/P wiring harness junction block connector C3 and dome light. Go to step 11).
  9. Replace left I/P wiring harness junction block. Go to step 11).
  10. Replace BFC. See REMOVAL & INSTALLATION  . Go to next step.
  11. Clear DTCs. Perform BFC DIAGNOSTIC SYSTEM CHECK  .


  1. If BFC diagnostic system check was performed, go to next step. If BFC diagnostic system check was not performed, see procedures in BFC DIAGNOSTIC SYSTEM CHECK  .
  2. Disconnect BFC Pink 24-pin connector C3. Remove left and right courtesy lights. Turn dome switch to OFF position. Using DVOM, check voltage between BFC harness connector C3, terminal A11 (White wire) and ground. If zero volts exists, go to step 10). If zero volts does not exist, go to next step.
  3. Disconnect left I/P wiring harness junction block Brown 68-pin connector C1. Disconnect left I/P wiring harness junction block Gray 30-pin connector C2. Disconnect left I/P wiring harness junction block Black 30-pin connector C3. Using DVOM, check voltage between BFC harness connector C3, terminal A11 (White wire) and ground. If zero volts exists, go to step 5). If zero volts does not exist, go to next step.
  4. Repair short to battery in White wire between BFC connector C3 and left I/P wiring harness junction block connector C1. Go to step 11).
  5. Using DVOM, check voltage between left I/P wiring harness junction block Gray 30-pin harness connector C2, terminal C3 (White wire) and ground. If zero volts exists, go to step 7). If zero volts does not exist, go to next step.
  6. Repair short to battery in White wire between left I/P wiring harness junction block connector C2 and left and right courtesy lights. Go to step 11).
  7. Using DVOM, check voltage between left I/P wiring harness junction block Black 30-pin harness connector C3, terminal C10 (White wire) and ground. If zero volts exists, go to step 9). If zero volts does not exist, go to next step.
  8. Repair short to battery in White wire between left I/P wiring harness junction block connector C3 and dome light. Go to step 11).
  9. Replace left I/P wiring harness junction block. Go to step 11).
  10. Replace BFC. See REMOVAL & INSTALLATION  . Go to next step.
  11. Clear DTCs. Perform BFC DIAGNOSTIC SYSTEM CHECK  .
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