Something I really miss from modern cars is a beep telling me i’ve left the headlights on when I open the door. As we’ll be venturing further and further afield, anything to prevent a dead starter battery in the middle of nowhere is a definite bonus. Luckily, the T25 has everything ready for this easy low cost modification.
The buzzer is wired in between the fused Blue/Grey cable which powers the dash illumination (switched on and off with the headlight switch) and the courtesy light pressure switch in the door pillar.
As the Blue/Grey wire only receives power when the headlight switch is turned on, the buzzer will only sound when the lights are on and door is opened (grounding the pressure switch).
- 12V Buzzer (£2.99 from Maplins)
- WAGO 2-Way Connector (£0.30)
- WAGO 3-way Connector (£0.40)
- Electrical Wire and crimp connectors (I used 21A rated I had from previous projects)
The pressure switch is secured by a phillips screw, I undid this and pulled the cable out slightly.
I then chopped the brown earth wire and pulled it through to behind the dash*. Next, I fed the new black earth lead through and crimped a connection on. The brown earth, black lead and buzzer negative were then connected using the Wago 3-way block.
*There are 2 holes in the rear of the pillar which are positioned slightly higher than the switch. There is one tiny and one larger hole (I routed through the big one). If you put your hand around you will find them eventually. (Thanks to Dave Hayler on the VW T3 ( T25 ) Knowledge Exchange group for helping me find it).
When I fitted a Switchable USB Socket the Blue/Grey wire connection was left unused (originally it powered the LED). I decided to run the buzzer positive from this plug instead of splicing into the cable elsewhere.
The other side of cable is attached to the buzzer positive via a 2-way Wago connector.
Finally the new crimped connection is pushed onto the switch and screwed back into place. I secured the buzzer and Wago connectors behind the dash.
A quick and easy modification which costs £4. Here’s the buzzer in action: