LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 1997 >> Catera >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Module >> Diagnosis & Repair >> DTC B2473, High Beam Fault >> Testing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC B2473, High Beam Fault: Testing

  1. If BCM system check was performed, go to next step. If BCM system check was not performed, go to BCM SYSTEM CHECK  .
  2. Connect scan tool. Select HIGH BEAMS from light test menu in Special Functions. While observing scan tool, press on and off buttons on scan tool several times. If status changes and high beam lights operate with commanded state, go to next step. If status does not change or high beam lights do not operate with commanded state, go to step 4).
  3. Check for poor connection at BCM 32-pin, connector C2, terminal C08 (White wire). Check all BCM power and ground circuits. See WIRING DIAGRAM  . Ensure all connectors and components are connected. Using scan tool, clear codes. Check for codes. If DTC B2473 is set, go to step 5). If DTC B2473 is not set, go to BCM SYSTEM CHECK  .
  4. Disconnect BCM 32-pin C2 connector. Disconnect C200B connector located in instrument panel wiring harness-to-body wiring harness at lower left "A" pillar. Using DVOM, check resistance between BCM connector C2, terminal C08 (White wire) and C200B connector terminal No. 58 (White wire). If resistance is less than 2 ohms, go to step 6). If resistance is not less than 2 ohms, go to step 7).
  5. Replace BCM. Perform BCM SYSTEM CHECK  .
  6. Move DVOM lead from C200B connector terminal No. 58 (White wire) to ground. If resistance is infinite, go to step 3). If resistance is not infinite, go to step 8).
  7. Repair open in White wire between headlight (high beam) relay and BCM. Perform BCM SYSTEM CHECK  .
  8. Repair short to ground in White wire between headlight (high beam) relay and BCM. Perform BCM SYSTEM CHECK  .
scientia non olet · About LEMON Manuals