Hardwiring DashCam & SatNav for less than £10 With DIY Kit

Honda Jazz 2002-2008

  1. legend-ary
    Difficulty Level:
    If like me you use both SatNav and Dashcam on your journeys and your car has only one lighter port you have to make a choice on what to run. Previously I was using a battery pack to run SatNav while Dashcam was running off lighter port. This is my attempt to clean up the wires running up and down the dashboard and also run both devices off lighter supply so they switch on and off with ignition so they don't drain the battery with car is switched off.

    The idea is to tap into lighter fuse and use it to run both devices. This would mean the actual port itself is free to charge the phone or whatever. We will run the wire behind the door seal and up the headliner. Original idea was to have the sat nav in the middle but decided to keep it on right as it would mean sat nav is closer to hand.

    This guide can be used to put ports in any car as the basic principle is the same.

    This guide assumes you have access to atleast basic set of tools such as pliers and a Philips screwdriver. Please take this as a guide and I do not accept any responsibility for your hair catching fire. lol

    Tools you need:
    * Crimping tool or Pliers (for stripping of wires and crimping the connectors on wire ends)

    * Trim tool or bank card (for pushing the cables behind rubber seals and other trim)

    * Crimp Connecters £2.75 -

    * Piggy Back Fuse Connector £2.99

    * Dual Power Adapter £3.09

    * Relevant cables/adapters that came with your devices (TomTom & Dashcam adapters + usb cables)


    Step 1:

    The hardware: dual lighter port, piggy back, relevant fuses and cables.
    We will cut the lighter plug off the dual ports and join the live with the piggy back while earth wire will be attached to a chassis (more on that later)

    Step 2:
    Take off existing ends and strip the wires.
    3. 4.
    Step 3:
    Unscrew the caps off the ports and you will see this. They are very fragile so don't move them around too much as the solder might come off. Take note of the Earth and Live wires. You will need to join each earth and each live with the respective wires from the second port.
    Step 4:
    Join each of the Earths together and do the same for Lives. 6a.
    Step 5:
    You will end up with something like this. don't forget to screw the covers back on before you connect the two

    Step 6:
    Crimp a round end on the Earths as this will be mounted on a suitable point on the body.
    Step 7:
    I crimped a spade type connector on the end of the piggy back and crimped a receiving end on the end of live wires
    Step 8:
    This is where Jazz specific post starts but you can easily use this as a general guide to plug it into your own car.

    I intend to hide the wires and ports behind the fuse cover. In addition to the fuse cover which simply clips off, you will need to undo the two highlighted screws to take the surrounding trim off to gain better access.
    Step 9:
    Fuse cover pulled off. 8 is the fuse we will be plugging in the piggy back as it switches on and off with ignition. Plug it anywhere else and it will be on all the time draining your battery (unless you have one of those always on dashcams which come online when they detect movements). 11.JPG 12.JPG

    Step 10:
    Surrounding trim off after taking the previously mentioned screws off.

    Step 11:
    See the bolt holding the fuse box in place on the left handside, that is what we will be using to mount the earth. 14.JPG

    Step 12:
    Piggy back in, the 8 fuse (15A) goes in the bottom of the piggy back while the top one is a 5A fuse is for the devices. I will replacing this with 3A later on.

    For testing, I mounted the earth on a nearby screw to see if all connections are good. You can see the piggy back to lighter port connectors in this photo. (I later covered the connector with a rubber grommet) 15a.JPG
    Step 13:
    Do test the connections before fitting everything nicely otherwise you will have to open everything up later. 16.JPG
    Step 14:
    Put everything nicely and made sure nothing is lose and doesn't move about. You can see the earth screwed in behind nut holding the fusebox in place.

    Step 15:
    At the bottom left you have plenty of space to put the power supplies/adapters. from there the wires run across to the right side and exit at the bottom
    Step 16:
    The excess wire can be neatly placed on the right as there is an empty space there. 19.JPG
    Step 17:
    You can see the wire as it exits from the bottom right corner and goes up under the door seal.

    Step 18:
    This is how I routed the wires. The red shows path of satnav wire that runs behind the door seal and comes out right next to air vent. The yellow path shows the path of the dashcam wire which runs up the door seal then behind the pillar trim and across the screen behind the headliner and exits right next to rear view mirror.
    Result! What wires? 21.JPG
    many thanks to @SpeedyGee for answering my million questions.

Recent Reviews

  1. mcgowanp
    Great guide.used it to do my own.much appreciated
  2. RogerH69
    Excellent guide. Really does make it look so simple. I may give this a go with my Prelude :-)
    1. legend-ary
      Author's Response
      Thanks Roger. It really was quite simple to do it all up. Good luck!
  3. Ichiban
    Simple and effective install good work bud,
    1. legend-ary
      Author's Response
      Cheers @ichiban
  4. exec
    fantastic guide and great job too.
    1. legend-ary
      Author's Response
      Thanks @exec :)