The installation takes about 30 minutes if you don't run into problems. For safety while you're working pull Fuse 9 from the fusebox and see that the dome light does not light. If you're not happy crimping cables in the car get the install completed by a competent auto electrician.
To do this you will need the following:
Dashcam (the Nextbase I installed is available here
12V USB Adapter (This is like the one I bought
Short (20cm) USB A Male to mini-USB lead (This is like the one I had
Two cable crimps (A set of ten is available here
Plastic panel tool
Crimp tool for crimps (I used heavy duty pliers)
Step 1 - Using a thumb or a plastic panel tool ease down the cover off the dome light.
Step 2 - Once the cover is safely off undo the two screws nearest to the windscreen. Be careful of the lens in front of the dome lamps. These are fragile and may break easily.
Step 3 - Using the rear view mirror as a help ease the dome light housing towards the rear of the car and pull the front part of the housing down till the clips are visible. Now push the housing towards the front of the car and pull the rear part of the housing down till the metal clips release and the housing is free.
Step 4 - You can see that there are two plugs and cables that are connected to the housing. The larger one on the end connects the lamps and switches. That's the plug we want. The smaller one in the centre is for the infrared sensor. Disconnect both plugs and put the dome housing somewhere safe. You may have to unclip the smaller plug to separate it. If so, ease back the two grey clips and ease the connector out then pull the connectors apart. Ease the cables down from the roof lining, separate them and prepare them for crimping.
Step 5 - Ease the mini-USB plug through the headlining where it meets the windshield ready to connect to the dashcam
Step 6 - Using one of the crimps connect the Red wire from the USB adapter to the Red/Grey wire on pin 4 of the dome light plug. Using another crimp, connect the Black wire of the USB adapter to the Brown wire on pin 2 of the dome light plug. (Note if you've not pulled Fuse 9 out, the red/grey cable is at 12V so be careful with metal tools near the car metalwork).
Step 7 - Plug the USB lead you installed in Step 5 into the 12V USB adapter and, if it's nearby, connect the dashcam. The dashcam should charge or turn on with Fuse 9 installed. If it does, then success! You're ready to re-assemble the dome light.
Step 8 - carefully push the cables and USB 12V power adapter into the gap in the headlining between the dome light opening and the windscreen. Then offer the housing back up to roof and insert it cable-first. The housing will just click back into place with simple finger pressure. Insert and tighten the two screws (remember the housing is plastic - don't over-tighten them) then offer up and clip into place the outer cover of the housing. If the dashcam is still connected it should still be on and the dome lights should also still work.
To complete the installation position the mount of the dashcam on the windscreen where you want the dashcam sited - remembering that the power lead is only 20cm long.
Finally a couple of tips for you:
- Remember to remove the dashcam when you have finished driving if you are not using it to avoid draining the battery.
- If your dashcam has a 'parking mode' then it will work in this mode with this wiring set up.
- I've configured my dashcam to power on when it is connected and then to black out the screen after 30 seconds. This gives enough time to see it's working and to align the camera before I set off.
- Once you're driving you shouldn't be looking at or be distracted by the dashcam.
- And last, but not least, please check your local laws with regard to dashcam installation and use.