How to Wire a 12 Volt Motor To Run Forward & Backwards

Written by will charpentier
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How to Wire a 12 Volt Motor To Run Forward & Backwards
(Jupiterimages/liquidlibrary/Getty Images)

If you've decided to stop hauling your anchor up by brute force, you'll probably want to use an anchor winch to do the job. Unless you already have a hydraulic system aboard your boat, you'll probably choose an anchor winch with a 12- or 24-volt DC electric motor. Unless a reversing control switch is supplied with the anchor, the switch you'll need is called an "On-Off-On" double pole, double throw switch (DPDT). This kind of switch will allow you to both raise and lower the anchor, and has a centre "Off" position allowing you to shut the winch down.

Skill level:
Moderate

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Things you need

  • Center-off double pole, double throw switch
  • Soldering iron
  • Silver core solder
  • Wire

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Instructions

  1. 1

    Look at the contact poles on the bottom of the switch. As you hold the switch, bottom up, there are two lug terminals on the left, two lug terminals on the right and two in the centre of the bottom of the switch.

  2. 2

    Solder the lead from your power source to the lug terminal on the upper left with a soldering iron, using silver-core solder. Solder a length of wire onto the lower left lug terminal that's long enough to connect to your boat's common ground.

  3. 3

    Make two "jumper wires" from short pieces of wire by stripping a bit of the insulation from both ends. Solder one end of the jumper wire to the lug terminal on the upper left end of the switch. Solder the other end of that jumper to the lug terminal on the bottom right of the switch.

  4. 4

    Solder one end of the second jumper wire to the lug terminal on the lower left end of the switch to the lug terminal on the top right end of the switch with jumper wire.

  5. 5

    Solder the wires from the motor to the centre lug terminals of the switch.

  6. 6

    Check the position of the switch, to ensure that the switch is in the centre "Off" position. Solder the lead from your power source to the lug terminal on the upper left with soldering iron, using silver-core solder. Solder a length of wire that's long enough to connect to your boat's common ground onto the lower left lug terminal.

Tips and warnings

  • This project involves using a soldering iron and solder; appropriate precautions should be taken to prevent burn injuries or fire.

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