4 pin relay with one pin doubled up. This relay can replace Lucas SRB111. It is normally open (Off) until a low wattage supply is fed to pins W1 and C2. W2 is connected to the battery, via a fuse, and the load (lights, horn etc) is connected to C1. The switch W2/C1 can carry 20 amps at 12 volts.
1. Connect C2 & W2 to the battery 2. Connect C1 to the Load (Horn, lights etc.) 3. Connect W1 to the actuator switch (Horn push, light switch etc.) Note that there are TWO C1 terminals (shown in main picture but not in diagram) which are connected internally. Any or both of these can be used.