LEMON Manuals: Even more car manuals for everyone
Home >> BMW >> 1989 >> 525i Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Tests W/Codes >> Trouble Code Diagnosis >> Malfunction Light Not On/No Start >> Main Relay

Main Relay

Turn ignition switch to OFF position. Disconnect main relay (in control box at right or left shock tower). Perform voltage tests at relay connector as indicated in MAIN RELAY TESTS  table. Correct any problems found. If voltages are as specified, replace main relay.

MAIN RELAY TESTS

Measure Between Correct Voltage If Voltage is Incorrect
No. 6 & Gnd. Battery (1) Battery
No. 8 & Gnd. Battery (1) Battery
No. 6 & No. 4 Battery (2) MCU No. 36
(1) Repair open in wire from indicated component.
(2) Repair open wire to indicated MCU terminal.
scientia non olet · About LEMON Manuals