Interlock switch 1 Remove the back cover (see page 315). CAUTION Before removing the wires from the multi-bin mailbox interlock switch, note the location of each wire. Replacing the wires incorrectly can damage the interlock switch. (callout 2). 334 Chapter 6 - Removal and replacement EN Figure 2 Disconnect two wires from the switch (callout 1). 2 12 185. Interlock switch 3 Press the two retaining tabs together to remove the switch