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Home >> Mercedes Benz >> 2005 >> S55 >> Repair and Diagnosis >> Electrical >> Fuses & Circuit Breakers >> Fuse & Circuit Breakers - 215 & 220 Chassis >> Fuel Pump Relay, Location/Task/Design/Function - GF54.15-P-4105 >> Fuel Pump Relay Position / Task / Design / Function - GF54.15-P-4105L >> Fuel Pump Relay Function - GF54.15-P-4105-02L

Fuel Pump Relay Function - GF54.15-P-4105-02L

Shown On Model 140 

Fig 1: Identifying Fuel Pump Relay Module - Shown On Model 140
G04607669Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

The fuel pump relay (K27) is switched by a ground signal from the control unit at terminal 86. If the contact is closed, the fuel pump (M3) is connected to terminal 30 (B+) via terminal 87. Circuit 30 is protected by a 30 A fuse.

On vehicles with two fuel pumps, the pumps are connected in parallel.

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