DIY - Headlights off with the Ignition Switch

[CTScott]

Originally Posted by townkat

hi all,
i was just wondering, aren't the headlights already powered trough a relay from factory? (or all the power go directly trough headlight switch ?)
if so can't we make the change directly there? without adding another relay? just by changing the command source?

btw i have an yaris d4d, automatic transmision, with keyless entry and start and digital dash and i love it

They are controlled by a set of relays, but those relays are controlled by the headlight stalk. If you wanted to make the ignition control the headlights instead, then you could move the control point, but if you want the ignition to intercept that feed, as I did here, you need another relay.