How to wire a 6 post 12 volt switch

Written by william kinsey
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How to wire a 6 post 12 volt switch
Relays can be used to control a number of different devices. (12 volt relais, relay image by Sascha Zlatkov from

A 6 post 12 volt switch is another name for a 6 pin 12 volt relay switch. Some relays have five pins which includes the two solenoid control pins and the three pins of the SPDT switch. A 6 post 12-volt switch includes the two solenoid control pins and a 4 pin DPDT switch. This type of switch can either control both the positive and negative wire of one device, or control two devices at one time.

Skill level:

Things you need

  • Wire cutters
  • Wire strippers
  • 6-pin 12 volt relay
  • Relay wiring diagram

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  1. 1

    Look at the relay wiring diagram. Identify the two terminals which connect to the solenoid coil. These two pins control the switching of the solenoid. Connect those two pins to the device that will control the solenoid.

  2. 2

    Locate the remaining four pins. Two of these pins represent one side of the switch and the other two represent the other side of the switch. If this switch, for example, is meant to connect a fan motor to a battery, then connect the positive and negative terminals of the battery to one pair of pins. Looking at the wiring diagram, the pins used should both be on the same side of the switch.

  3. 3

    Connect the positive and negative terminal of the fan motor to the remaining two pins. When the relay is energised the switch will close, connecting the positive battery wire to the positive motor wire and the negative battery wire to the negative motor wire. This will complete the circuit and turn the fan motor on.

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