EFI Main Relay
- EFI main relay is mounted on ECM, located under left side of instrument panel, near kick panel. See Fig 1
. Disconnect electrical connector from EFI main relay.
- Using ohmmeter, ensure continuity exists between Black/White and Blue wire terminals of EFI main relay. Apply battery voltage to Black/White wire terminal. Ground Blue wire terminal. Continuity should exist between Black/Red and Blue/Black wire terminals. Replace EFI main relay if continuity is not as specified.
Courtesy of GENERAL MOTORS CORP.