Check, removal and installation of the relay of the fuel pump

If the fuel pump is not working (no noise from work), the voltage supply must be checked in the following sequence: safety switch at the bottom left in the driver's footwell (Ford KA: on the right in the front passenger's footwell) must be on, the fuel pump fuse must be intact. The location of the fuses is indicated in chapter «electrical equipment».

If no faults are found, check the fuel pump relay and replace if necessary. Relay testing is described in chapter «electrical equipment».

Removal/Check

Switch off the ignition.



Ford Fiesta/Mazda 121: open the hood and remove the seal on the side of the bulkhead of the engine compartment.

Ford KA: open the cover of the fuse box under the instrument panel. Unscrew the two bolts and remove the central mounting block by pulling it out. Behind the mounting block is a relay block.



Carefully pull the fuel pump relay up and replace it with a good relay. Ford Fiesta/Mazda 121: The relay is second from the right (see picture). Ford KA: The relay is located second from the bottom right on the relay box under the instrument panel.


If there is no good relay, then bridge contacts 3 and 5 in the relay socket with a thick wire. The fuel pump should work (you can hear the noise next to the fuel tank). If this is not the case, then the wires or the fuel pump are faulty.



In the workshop, you can check the performance and pressure of the fuel using special instruments. Required values: fuel pump capacity - 80 l/h, pressure - 3.0 bar.

Installation

Insert correct relay.

Ford KA: install the central mounting block. О Install the fuse box cover.

Ford Fiesta/Mazda 121: Place the seal on the bulkhead of the engine compartment.

Start the engine and check its operation.