Question about Cars & Trucks
Can't find the fuel pump relay in my mercedes.
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Posted on Jan 02, 2017
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MPI CONTROL RELAY AND FUEL PUMP
RELAY CONTINUITY CHECK
UNDO THE RELAY CONNECTOR
1) Without Battery Voltage: check continuity between connector terminals 2 & 4
2) With Battery Voltage: connect 12v battery power to connector terminals 2 (-) & 4 (+) . Then, check continuity between connector terminals 1 & 3. Refer to diagram below:
If the relay connector does not measure the correct continuity, then replace the relay.
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