DIY - Headlights off with the Ignition Switch

[townkat]

i know that, but i understand that the headlights stalk just powers the command of some relays, so just few milliamperes ...

Originally Posted by CTScott

They are controlled by a set of relays, but those relays are controlled by the headlight stalk.

and my suggestion is to change the source of the headlights stalk switch, not its destination

anyway, thanks for the heads up, what you say it's true, just that i think it is not the case here..

[townkat]

so, headlight stalk control some relay, so there is little current going trough it

Originally Posted by CTScott

You really want a relay in there to keep the headlight and ignition circuits separate. The relay allows one circuit to switch the other, without being a direct connection.

if you can detail a little bit on this i would love to understand more, what can happen bad if relay is not used, as i am very tempted to wire them directly if i can't see a direct drawback

thank you

[shepd]

If you put more current through a switch than it can handle, typical failure modes include it becoming unreliable, it completely failing, the item physically disintegrating (due to arcing), and at worst, fire.

If a switch is meant to control a relay (likely less than .2 amps) and you place a 10 A current through it (what your headlights draw) I would lean to the end of the list (disintegrating or fire).