fog light circuit vw 53b

I am ridding myself of dash mounted switches on my '89 VW Scirocco.  I have decided to retro fit Valeo lighting stalks and just use the connectors in the main body to allow me to do this.  Consequently, I was stumped with the Fog lights as the stalks employ a momentary action to activate the fogs in a Peugeot.

The 12V Acc is a feed from the side lights.

The "Lamps" indicate the existing wiring, so this is all added in instead of the two switches currently on the car.

I have designed this so that to turn rear fogs on, one twist (push of the switch) then to turn front fog lamps on, another twist (another push on the switch)

To turn them off, one twist of hte switch in the opposite direction (push of the off switch) OR remove power from the circuit (turn off the side lights)

I may well change the source of the 12V Acc, as this would mean that the fog lights can remain illuminated with the ignition turned off... a nice battery drainer whilst in the shop and I've forgotten :D

Thoughts and critique is welcome

hmmm... so now I've posted it up a limitation immediately springs to mind.

Pushing to make the circuit will switch both sets of lights on unless I'm REALLY fast.  Need to integrate some form of timer mechanism, maybe a Capacitor with a recharge rate of say 0.5 seconds inserted (somehow) into the second half of the circuit say on the red trace leading into the two 30 pins on the right hand side?

Indeed, I think I get it... however, how is the relay "pushed" open?  That's kinda puzzling me :)

Also, as I have only one switch for two "operations" do I wire this circuit up in a similar manner to the one I posted above?  I'll have a play later and do some jiggery pokery on SmartDraw.

Had a bit of a mooch on the net for various circuits.

Came across one that utilises a decade timer (which I have, so that helps)

Here's what I came up with

Hi Oldspark,

From what you've said this might well be a workable solution.  I am having to design the circuit around the switches, to operate fog light relays on a car using a rotary momentary switch.

Now in itself the concept is fairly simple.



The fog light switch is on the top left stalk. This is a two section switch, the normal headlights are on the outside end of the stalk, then another rotary momentary section further in for the foglights.

To switch the lights on, you rotate upwards once for rear light, then upwards again for front. To switch off, is rotate down in the same increments, although an all off output with one twist down is fine, if I need the rear fog lights on I can just turn them on again.

Turning the main lights off also resets the fog lights to the off mode.