Yugo Workshop Manuals
Yugo L4-1300cc 1.3L (1991)
Powertrain Management > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Engine Control Module > Component Information > Testing and Inspection > Control Unit Voltage Supply Inspection > Page 378
c. With ignition switch in Run position, check for battery voltage at main relay terminals 85 and 86. If battery voltage is not present, check for
continuity between main relay terminal 85 and ground, and between terminal 85 and ignition switch terminal 15.
d. Check for battery voltage on main relay connector terminals 30 and 85. If readings are identical, check for damage to wires between main
relay connector terminal 85 and ground, and between main relay connector terminal 30 and the battery.
e. If all wires and connections test good, and no voltage is present at ECU, replace main relay.
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