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Main Relay (Metro)
- Using an ohmmeter, ensure there is no continuity between terminals "A" and "B". See Fig 1
. Ensure there is 56-84 ohms of resistance between terminals "C" and "D".
- Connect ohmmeter between terminals "A" and "B". Apply battery voltage to terminal "C" and ground terminal "D". Ensure there is continuity.
Courtesy of GENERAL MOTORS CORP.