Quote:
Originally Posted by Zulfiqar
I loved my VW Golf for this, the key on position also carried positive supply to the headlamp switch. It also had a load reduction relay that cut off power to nearly all items on the car, headlamps, A/C blower, rad fan and stereo for full juice supply to the starter.
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My VW had the headlights on that circuit but not the parking lights, so I still managed to run the battery down a few times.
I think the cleverest design was a Saab 95 I owned. It had a little bit of relay logic in the circuit; if you turned on the lights while the car was running, they would turn off automatically when you turned off the key; but if you switched them on with the car stopped, they would come on and stay on. So you could still have the parking lights on if you needed them, but you couldn't leave them on by mistake.