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Discussion Starter · #1 · (Edited)

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Discussion Starter · #6 ·
Just what I was looking for!

But what about a real automatic off headlight? Is that possible?
Not sure if this Power Off Delay Switch could be wired to do that. There would have to be a way to trigger the timer as well as bypass the manual ON setting of the headlight switch.

I know there is an OEM timer circuit that will shut off power to the dome lights after about 15 minutes, but I've never tried leaving my headlights on for 15 minutes to see if they will automatically turn off...
 

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Not sure if this Power Off Delay Switch could be wired to do that. There would have to be a way to trigger the timer as well as bypass the manual ON setting of the headlight switch.

I know there is an OEM timer circuit that will shut off power to the dome lights after about 15 minutes, but I've never tried leaving my headlights on for 15 minutes to see if they will automatically turn off...
I am just thinking about your schematic for wiring the headlights. Suppose if you leave the light dial to "OFF", connect the headlight directly to the ignition 12V, using a light sensor switch will make it only turn on at night, wiring the relay to the dome light to signal the delay.

Will that work?

This will make a complete automatic headlight, just like in my other car, Infiniti G35.

I have been driving my G for 10 years, so I am so used to not turning off the headlight... :p
 

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Discussion Starter · #8 ·
I am just thinking about your schematic for wiring the headlights. Suppose if you leave the light dial to "OFF", connect the headlight directly to the ignition 12V, using a light sensor switch will make it only turn on at night, wiring the relay to the dome light to signal the delay. Will that work?
I've not thought this all the way thru but I foresee some problems making this into a Fully Automatic Headlight using just this module. I see some timing problems also.
  • when you say "connect the headlight directly to the ignition 12V" I think you actually mean "provide power from ignition to the headlights via the Power Off Delay Module" (and keep the rest of the OEM wiring intact)
  • you will need to procure a 12volt daylight sensor, and have it work together with the Power Off Delay Module (maybe via a separate relay) to cut power from the ignition to the headlights during the day
  • cannot turn on your headlights unless you have your key in the ignition and in the ON (IGN) position (unless you turn your headlight switch to manually "on" ---> but then if you turn your headlights manually "on" they wil not turn off)
  • the automatic trigger will not turn on your headlights if you are driving during daylight and into the night unless you open your door. To overcome that, you'd need to set the power off delay to something very long, ie hours.
Like I said I haven't thought this all the way thru, these are just my thoughts so far. However the module is very inexpensive, so it would be easy for you to buy one to experiment.
 

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Thank you for your input.

Yes, I mean "provide power from ignition to the headlights via the Power Off Delay Module" (and keep the rest of the OEM wiring intact)"

What I had in mind is to make the "OFF" setting into full automatic headlight And add an extra switch to allow turning off the headlight in this auto mode.

And yes, I want to it be just like what you said " [*]cannot turn on your headlights unless you have your key in the ignition and in the ON (IGN) position (unless you turn your headlight switch to manually "on" ---> but then if you turn your headlights manually "on" they will not turn off)"


From the relay spec, it will handle [email protected] I am not sure if it will handle the equivalent power [email protected] But we can always use a relay.

the 12v daylight sensor (with a relay) will be connected in series to this circuits, so during daylight, this delay relay circuitry is totally shut off.

As night, it will works just like your fog light schematic, having the dome light to trigger the timer.

I had ordered one from ebay according to your link. They have a newer model now, but I ordered the same as yours.

My bench PS is a computer PS, so can only handle 5A at 12V, or 10A at 5V, not sure if it will be sufficent to test this.


I know the relay doesn't come with instruction.

One question, does the delay relay require a 0->1 pulse to trigger the light to turn on?



I've not thought this all the way thru but I foresee some problems making this into a Fully Automatic Headlight using just this module. I see some timing problems also.
  • when you say "connect the headlight directly to the ignition 12V" I think you actually mean "provide power from ignition to the headlights via the Power Off Delay Module" (and keep the rest of the OEM wiring intact)
  • you will need to procure a 12volt daylight sensor, and have it work together with the Power Off Delay Module (maybe via a separate relay) to cut power from the ignition to the headlights during the day
  • cannot turn on your headlights unless you have your key in the ignition and in the ON (IGN) position (unless you turn your headlight switch to manually "on" ---> but then if you turn your headlights manually "on" they wil not turn off)
  • the automatic trigger will not turn on your headlights if you are driving during daylight and into the night unless you open your door. To overcome that, you'd need to set the power off delay to something very long, ie hours.
Like I said I haven't thought this all the way thru, these are just my thoughts so far. However the module is very inexpensive, so it would be easy for you to buy one to experiment.
 

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Oh, One more question!! where did you get the switch for the foglights? I am trying to use the OEM wiring to wire my fog, but they don't come with a switch :(

I tried ebay, but coudln't find one.
 

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Discussion Starter · #12 ·
At night, it will works just like your DRL light schematic, having the dome light to trigger the timer.

My bench PS is a computer PS, so can only handle 5A at 12V, or 10A at 5V, not sure if it will be sufficent to test this.

One question, does the delay relay require a 0->1 pulse to trigger the light to turn on?
Be aware the dome light is supplied with constant +12v and is faded out (turned "off") by raising the dome light "ground" to +12v. I found this out when I added underglow (see Light Frenzy 2 on my website). Adding a relay worked but produced relay chatter so instead I used a PNP transistor.

5A @ 12vdc should be fine for bench testing the module.

The module activates the relay when +12v is applied to the trigger, but the timer countdown does not start until the +12v at the trigger is removed.
 

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Be aware the dome light is supplied with constant +12v and is faded out (turned "off") by raising the dome light "ground" to +12v. I found this out when I added underglow (see Light Frenzy 2 on my website). Adding a relay worked but produced relay chatter so instead I used a PNP transistor.

5A @ 12vdc should be fine for bench testing the module.

The module activates the relay when +12v is applied to the trigger, but the timer countdown does not start until the +12v at the trigger is removed.
So what I see here is it should work perfectly if I connect the "IGN" (or the cigarette plug) to the trigger input.

When I turn my key to "IGN (On)" position, the power from the IGN line (I assume there's a wire for that, I never work with these stuff before) will be +12V. This will latch the relay to ON for the headlight to come on. When I remove my key from my car and leave, this IGN wire will be 0V and the delay timer will start and latch OFF the relay and turn off the light after the count down. So basically I don't need the dome light as trigger?
 

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Discussion Starter · #15 ·
So what I see here is it should work perfectly if I connect the "IGN" (or the cigarette plug) to the trigger input.
I would connect to the IGN wire or something similar. Else if you are parked and have the key on ACC to listen to the radio, your headlights will be on.

(I edited the following a bit): When I turn my key to "IGN (On)" position, the power from the IGN line will be +12V. This will [turn] the headlight on. When I remove my key from my car and leave, this IGN wire will be 0V and the delay timer will start turn off the light after the count down. So basically I don't need the dome light as trigger?
Correct, you don't need the dome light as a trigger. In fact, since the power for the power windows is supplied for about 30 seconds after the engine is shut down, you may not need the Power Off Delay Module at all.

SO: if a 30 second power off delay is OK with you, then you could get by with just a SPDT relay, with the relay connected as follows:
  • coil connected to power wire for the power windows, and ground
  • common connected to headlights
  • Normally Closed connected to OEM headlight feed
  • Normally Open connected to +12v (fused of course)
Here's the operating sequence:
  • key is turned to IGN, relay coil is energized via the power wire to the power windows, and the headlights come on
  • when engine is turned off, the relay coil continues to be energized via the power wire to the power windows, and the headlights remain on
  • after about 30 seconds, the power to the power windows is cut, and the headlights turn off
  • the Normally Closed connection allows the headlights to be operated by the OEM headlight switch
You can probably find the power wire for the power windows in either of the forward kick panels.

Note: all the schemes we've talked about so far have the headlights on at Full Brightness (not High beams) whenever the car is On. Usually Daytime Running Lights are High beams at 1/2 brightness, or dedicated lights.
 

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I would connect to the IGN wire or something similar. Else if you are parked and have the key on ACC to listen to the radio, your headlights will be on.



Correct, you don't need the dome light as a trigger. In fact, since the power for the power windows is supplied for about 30 seconds after the engine is shut down, you may not need the Power Off Delay Module at all.

SO: if a 30 second power off delay is OK with you, then you could get by with just a SPDT relay, with the relay connected as follows:
  • coil connected to power wire for the power windows, and ground
  • common connected to headlights
  • Normally Closed connected to OEM headlight feed
  • Normally Open connected to +12v (fused of course)
Here's the operating sequence:
  • key is turned to IGN, relay coil is energized via the power wire to the power windows, and the headlights come on
  • when engine is turned off, the relay coil continues to be energized via the power wire to the power windows, and the headlights remain on
  • after about 30 seconds, the power to the power windows is cut, and the headlights turn off
  • the Normally Closed connection allows the headlights to be operated by the OEM headlight switch
You can probably find the power wire for the power windows in either of the forward kick panels.

Note: all the schemes we've talked about so far have the headlights on at Full Brightness (not High beams) whenever the car is On. Usually Daytime Running Lights are High beams at 1/2 brightness, or dedicated lights.
Wow, your solution is even better than I thought it could be! A Simple SPDT will do the trick. Lemme try to absorb all your information and I will let you know!!
 

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Discussion Starter · #17 ·
I would connect to the IGN wire or something similar. Else if you are parked and have the key on ACC to listen to the radio, your headlights will be on.



Correct, you don't need the dome light as a trigger. In fact, since the power for the power windows is supplied for about 30 seconds after the engine is shut down, you may not need the Power Off Delay Module at all.


SO: if a 30 second power off delay is OK with you, then you could get by with just a SPDT relay, with the relay connected as follows:
  • coil connected to power wire for the power windows, and ground
  • common connected to headlights
  • Normally Closed connected to OEM headlight feed
  • Normally Open connected to +12v (fused of course)
Here's the operating sequence:
  • key is turned to IGN, relay coil is energized via the power wire to the power windows, and the headlights come on
  • when engine is turned off, the relay coil continues to be energized via the power wire to the power windows, and the headlights remain on
  • after about 30 seconds, the power to the power windows is cut, and the headlights turn off
  • the Normally Closed connection allows the headlights to be operated by the OEM headlight switch
You can probably find the power wire for the power windows in either of the forward kick panels.

Note: all the schemes we've talked about so far have the headlights on at Full Brightness (not High beams) whenever the car is On. Usually Daytime Running Lights are High beams at 1/2 brightness, or dedicated lights.
Important! I forgot to mention that as soon as you open a door, the power to the power windows is cut. (That's why I got the Power Off Delay Module in the first place...duh...brain fart...). So depending on what you want, you may need the module after all...
 

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Important! I forgot to mention that as soon as you open a door, the power to the power windows is cut. (That's why I got the Power Off Delay Module in the first place...duh...brain fart...). So depending on what you want, you may need the module after all...
Yes, that was what I thought too. So I guess I need the module. I am drawing up a schematic... I will be posting it soon.
 
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