I am not an electrical or electronics engineer but am quite experienced in general DIY etc and can figure most things - but I do like to check before undertaking a job - especially if it is outside of my area of experience.
What I am looking to do is to convert a car wiring so that the headlamps come on every time the car is started without having to switch them on.
A simple solution I came up with is to connect the dimmed headlight supply to a normally closed relay fed from the accessory switch on the car.
Then, when the headlights are turned on, the relay is switched to 'open' and the headlights are powered as normal.
I have attached a diagram.
What I am wondering is if I need to put something else in the line to prevent power feedback to the normal headlight switch when power is fed to the lights from the relay.
Any thoughts would be welcomed.
What I am looking to do is to convert a car wiring so that the headlamps come on every time the car is started without having to switch them on.
A simple solution I came up with is to connect the dimmed headlight supply to a normally closed relay fed from the accessory switch on the car.
Then, when the headlights are turned on, the relay is switched to 'open' and the headlights are powered as normal.
I have attached a diagram.
What I am wondering is if I need to put something else in the line to prevent power feedback to the normal headlight switch when power is fed to the lights from the relay.
Any thoughts would be welcomed.