Audible alarm when lights left on

[Tamago]

Originally Posted by jambo101

I never figured out why car mfgrs dont follow Subaru and have the lights turn off automatically when you shut the engine down.

most toyotas DO have that actually...

[CTScott]

Originally Posted by Tamago

most toyotas DO have that actually...

I sure do miss that from my Subaru Forrester.

That may actually be an easier and better fix for this issue. I have some extra automotive relays laying around to experiment with. I'll figure it out, then post a DIY...

[Tamago]

Originally Posted by CTScott

I sure do miss that from my Subaru Forrester.

That may actually be an easier and better fix for this issue. I have some extra automotive relays laying around to experiment with. I'll figure it out, then post a DIY...

you'd need a latching relay but it should be able to be done pretty easily..

that or grab the signal IN wire for the parking/headlights, and have it tie into the IGN circuit instead of the BATT circuit.

[CTScott]

Originally Posted by Tamago

you'd need a latching relay but it should be able to be done pretty easily..

that or grab the signal IN wire for the parking/headlights, and have it tie into the IGN circuit instead of the BATT circuit.

Looking at the EWD, I'm thinking that I'll use IGN as the input to the relay coil, then cut the ground (ED) wire to the headlight switch and insert the normally open relay contacts. The ground looks like the best "common", as it is used for the feed to the headlight relay as well as the headlight indicator on the combination meter.

[dobsona]

Originally Posted by Tamago

you'd need a latching relay but it should be able to be done pretty easily..

that or grab the signal IN wire for the parking/headlights, and have it tie into the IGN circuit instead of the BATT circuit.

Thanks for replies. Like the idea of teeing into the ignition circuit rather than using the battery. This could solve two problems, 1. leaving the lights on, 2. as we drive in Italy and it is obligatory to have lights on day and night, it would then be possible to leave them switched on.

As I do not have a wiring diagram at present, could you please indicate which wires need to be changed (which colour are they?) and where they are located.
Thanks agin for your help.

[CTScott]

Originally Posted by dobsona

Thanks for replies. Like the idea of teeing into the ignition circuit rather than using the battery. This could solve two problems, 1. leaving the lights on, 2. as we drive in Italy and it is obligatory to have lights on day and night, it would then be possible to leave them switched on.

As I do not have a wiring diagram at present, could you please indicate which wires need to be changed (which colour are they?) and where they are located.
Thanks agin for your help.

I did some experimentation last night with the headlights off with the ignition. The headlight dimmer switch connector is shown below:



ED is the common for the headlight switch (which actually provides power to the headlight relay's coil). I thought that opening it would turn off the headlights, and it does, but the parking lights remain on and the light reminder buzzer still buzzes. There is another circuit which also needs to be opened as well:

T1 is the common for the parking lights and the feed to the light reminder circuit for the instrument cluster. It also needs to be opened.

With a dual pole (DPST or DPDT) relay (12 VDC coil, 10A rated contacts) this can be accomplished:

The coil gets connected between the white wire on the ignition switch connector and a ground.

One set of normally opened contacts gets connected in between the headlight dimmer switch connector and the ED wire (wire gets clipped and the relay contacts are inserted in-line).

The other set of normally opened contacts gets connected in between the headlight dimmer switch connector and the T1 wire (wire gets clipped and the relay contacts are inserted in-line).


I only had SPDT relays laying around, so once I pick up a dual pole relay I'll do a better write-up with pictures...