What was found
NO BRAKES - POWER BRAKE MOTOR NOT WORKING. LOW BREAK PRESSURE ANNUNCIATOR STAYS ILLUMINATED. TROUBLESHOT & FOUND POWER COMING INTO BRAKE CONTROL MOTOR RELAY KNOB BUT NOT GOING OUT. RUNG OUT RELAY, NO POWER AT X1 OF THE RELAY. JUMPERED A1 & X1 AND RELAY CLOSED AND MOTOR CAME ON. DIODE BETWEEN A1 & X1 NOT WORKING (31711) REMOVED DIODE PN S3106-4. INSTALLED NEW DIODE PN S3106-4. SPLICED IN NEW DIODE WITH NEW WIRES. OPS CK GOOD. ALL IAW MM 20-21-03.