3/9 is the brake pedal switch. 3/19 is the 3rd brake light, does it turn on?, if yes the pedal switch is OK. 4/58 is the REM. See if relay RMI 5 clicks when pressing the pedal. Swap with another relay if need to test. Open the attached REM Relay PDF and zoom in to locate RMI 5 relay in the REM. The side panel will pry out some to get your hand on RMI 5 relay. Shunt 20/31 could have failed. Swap if needed. If removing shunt, inspect female shunt connectors for being burnt in REM. The 1999-2004 shunt terminals would burn on the low beams in the CEM's.
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