Howdy all.

Got a bit of an odd one. Because of the way I want the switches to be fitted (so that they look OEM) on my driving lamps, It means having two switches for my driving lamps, rather than one multi-position one.

So I want to be able to do the following:
On
High Beam Link
Off

But split across two switches, so one has a permanent on or off, and one lets me unlink the high beam as necessary.

Now my thoughts were to have a 5 blade changeover for the highbeam link, and a straight 4 blade relay to handle the on / off side similar to this ****ty diagram. Note I haven't included the other half of the relay for the coil switching circuit but thats fairly self explanatory.




The only issue is it would be nice to have it in 1 relay if possible, or even just simpler. I suck at component level electronics. Give me event power anytime.


cheers all

Dunc

Somebody will be along shortly that knows about this stuff

So, if I'm understanding you correctly,

you want to be able to switch your driving lights on along with your full beam lights - one switch on dash

and

you want to be able to switch your driving lights on WITHOUT your full beam lights being on - second switch on dash.

Is this correct?

If so why don't you just run two separate circuits, one triggered by the full beam circuit and the other triggered by, well whatever has got power when you want the driving lights on without the full beams. Then connect the two together before the driving lights.

I was worried about it backfeeding down the full beam circuit somehow from the always live circuit. Unless something like a diode would work down each leg?

My suggestion was off the top of my head, I didn't do a circuit diagram. I think that the relays would prevent any leakage but you could put a big diode in each side.

I was more concerned with fault finding. If you have a fault in a years time could you remember how it was wired if it was running in and out of two interconnected relays?

Completely agree with you there. Just need to work out how much juice a relay will take to hold it on.

DuncanS said:

Completely agree with you there. Just need to work out how much juice a relay will take to hold it on.

Click to expand...

Usually just under one amp.

Hmm. Thought it would be closer to .1 of an amp. Think a coil takes about 1.5/2W to energize it. Time to googlebash.