DIY: Auto Headlight Switch
One of the problems I had with the GT TSi was the lack of auto headlights. I got used (or rather spoilt) to this feature in the Jetta, that I kept forgetting to turn off the headlight switch before locking the car. This resulted in the parking lights staying on with the risk of the battery draining overnight. One of the DIY that many owners had mentioned was the auto headlight. Finally, completed the auto headlight switch installation yesterday. Took all of 10 minutes to finish the job. Compared to the
center armrest installation which took a back breaking two hours, this DIY was a walk in the park
Features:
Following are the features:
1. Auto headlights: The sensor fixed to the dashboard senses ambient light and automatically controls the light. Put the switch in "Auto" position and you can forget about headlight operation. In the night, when you turn on the car, the head light comes on in 2 seconds. When you turn off the car and take out the keys, the lights turn off completely (after a delay for the coming home function). No more worry about battery drain.
2. Coming home lights: After turning off the car and locking, the headlight stays on for 15 seconds and then goes off. This only happens in the night when there is no light. In the day time, the lights do not stay on.
3. Leaving home lights: When you unlock the car, the headlights come on for 15 seconds, and then turn off (they turn on again after the engine is turned on). This also happens only in the night.
The duration for the coming home and leaving home light function can be programmed from 5 to 60 seconds. Details are there in the pdf file provided by Ventoman (link in the reference section below).
References:
I used the following posts as reference. Thanks Gannu and Ventoman. I also thank Ventoman for answering my questions in his ownership thread.
Gannu's DIY
Ventoman's DIY
Ventoman's post with PDF file on configuration
Source and Price breakup:
I got the headlights from the below AliExpress link.
VW Auto Headlight Switch with Light Sensor
Paid $79 with FedEx shipping ($58 product cost, $21 shipping). Got the switch in 10 days. Had to pay a customs duty of INR680. Total cost around INR5850.
Photos:
As I did this installation in the night, I could not take detailed photos of the installation procedure. Managed to click some random pictures though.
The package from AliExpress. The headlight was packed well in foam sheet. The controller box was inside the smaller carton.
The contents. The package has one headlight switch, and a controller box with light sensor and cable assembly. The existing cable assembly in the car fixes to one side of the controller box. The cable assembly on the other side of the controller box fixes to the new switch. The cable with the light sensor has to be routed to the corner of the dashboard where the sensor can be stuck to the dashboard with the double sided tape that has been provided.
The plug assembly in the original cable fixes to this socket on one side of the controller.
The cable with the smaller plug connects to the socket in the new headlight switch.
The light sensor stuck to the corner on the dashboard, and the cable is routed to the area below the steering wheel.
I fixed the controller box using a zip tie in the space below the steering wheel. Added some padding to prevent rattling. Not entirely satisfied with this fixture. Will try to fix it better.
