I am going to wire a relay for approach and exit lighting. Please check this for me and tell me if I'm doing something wrong. The approach lamp configuration consist of Low beams wired through a relay, Positive current dome and puddle lamps wired through a relay, and back up lamps(+) that are directly to them through a diode.
The puddle/domes and Low Beam 86 terminals are going to be connected to the 87 terminal of the approach relay. The back up lamps will be tied into the 87 terminal also.

I will next wire the accessory switch the 85 terminal of the approach relay. The acc wire will be (-) when the key is off and (+) when on.

Then I have a remote start which actives a (+) feed for dome lights when unlocking the vehicle. I have not measured what current it is when off but I am assuming it is (-). I will wire that to the 86 terminal of the approach relay.

Then the last wire is the auto lamps wire from the head lamp switch. It reads 12V (+) constantly 24/7. I am wiring it of course to the 30 terminal of the approach lamp relay. This wire can be switched on and off by turning the autolamps on and off. The fused line will run through the autolamps fuse in the vehicles main fuse box.


Could you guys please thuroughly check this over for me and make sure I wont be doing something dangerous to me or my vehicle. Also will having the autolamps off cause an issue by taking that fuse out of the equation? (even though the accessory and remote start module have fuses also) and will having the 86 and 85 both be polarized at the same time cause an issue?

I greatly appreciate your help and am anxious to get this completed. If you guys have seen the new Chevys, this feature is designed to mimic them if it works without blowing my relay to to pieces or setting my vehicle up in flames.

 

I realized I messed up here. By doing this it will allow me to turn of the approach lights and keep the vehicle quiet when I unlock it, and it will also kill the domes and dim them upon placing the key in and turning it once.. Bu I still didn't solve the problem where it will turn the exit/approach lights on while I exi the vehicle. I want it wired through the auto headlamps because I can adjust their run time in the message center..

PLEASE HELP! Which wire should I use to trigger them as I turn off the vehicle? Will the accessory delay work? And where can I find that wire?

 

Low beams relay

Puddle/domelights relay

You are going to wire both above relay contacts around their switches? Or how will you wire them? I believe there is a interior light relay depending on what year vehicle you are working on. But you will get the power for the above from their original fused circuits correct?

Back-up lamps with a diode; So you are going to feed these with the autolamp circuit power correct? How large is the autolamp circuit? It will have to handle the power of the back-up lamps running through it.

There is not a problem usually with feeding a relay 12v on both sides to de-activate it. I was wondering though,, why do you need this? I am not following this part of the circuit logic exactly.

 

Yes, from their original fused circuits. It's an 05 expedition. The relays for the puddle and low beams are wired directly to their wires. Directly to the low beam (+) wire in the back of the head lamp switch. And puddle/domes at tapped into them after the vehicles original relay so that it will use a (+) current to turn them on rather than a (-).

These are all connected properly as they are working currently off of the remote start dome lighting wire. The backup lamp and activation wires from the 2 relays are all tied together and then connected with the RS dome light wire.(its what turns them on).

What I am trying to mak it do is retain that feature PLUS, deactivate them when the accessory switch adds the (+) current and cancels them out. AND repower those light to be exit lights upon removal of the key or regrounding them with the accessory switch.

I think what I'm really trying figure out is which wire comes off of the auto head lamp module and tell the lights to turn on, I want to use that wire and tell it to turn the approach/exit lamps on.

 

It should be to much on the headlamps brace the only extra current it will power is the back up lamps. The puddle lamps are on a different fuse. And although I will be drawing the low beam approach light from that switch, the relay they are on are feed through the constant 12V power and doesn't acutlly draw through the switches board. I may integrate a relay into the backup lamps if I find it necessary but do not think that will be the case.

The auto lamp 12V+ headlamp switch wire will Conection to my 30 terminal of the approach relay and it will allow me to have this feature off or on if I decide I don't want the vehicle to light up when I approach it. Very smart feature, just need a darn activation wire for when I turn off the key.

I thought about using the low beam wire but realized it would never turn of and id have to switch it off manually.

 

Here's a diagram.
AutoZone.com Repair Guide Image

If I am looking at this correctly, when you put the headlight switch in position 5, autolamps on, it sends voltage to the vehicle security module that tells it you want the autolamp feature. Then whatever it does, it then turns on the headlamp relay inside the security module, and that turns the headlights on. You can see when the headlight switch is in a normal position, the voltage from the switch runs around the security module and ends up at the same place, the red/yellow that feeds the steering column and the dimmer switch.