Main Relay

WARNING: This page is about a different car, the 2003 Mazda Protege5, 2003 Mazda Protege, 2003 Mazda MX-5 Miata, 2003 Mazda MPV, and 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: On MAZDA6, when testing ET control relay, use main relay testing procedure.

Ensure main relay clicks when ignition is turned on and off. If no sound is heard, locate and remove main relay from main fuse box, in engine compartment. Using ohmmeter, check continuity between main relay terminals "C" and "D". See Fig 1 and Fig 2 . Continuity should not be present.
Using fused jumper wires, apply battery voltage to main relay terminal "A" and ground terminal "B" (terminal E" on MAZDA6 & MPV). Continuity should be present between main relay terminals "C" and "D". See Fig 1 and Fig 2 . If continuity is not as specified, replace main relay.

Fig 1: Identifying Main Relay Test Terminals (Except MAZDA6 & MPV)

Courtesy of MAZDA MOTORS CORP.

Fig 2: Identifying Main Relay Test Terminals (MAZDA6 & MPV)

Courtesy of MAZDA MOTORS CORP.