domelight and reverse lights h1/4

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jcs091570

Copper - Posts: 155

Joined: March 23, 2009

Location: Arizona, United States

Posted: April 30, 2010 at 3:22 AM / IP Logged

I am interested in adding a little feature to my dome light supervision function. I have my DEI H1/4 wire pushing a relay and connected to my negative dome circuit. I would like to tap into the H1/4 wire to also illuminate my reverse lights at the same time. But not when I open the door in general. Only on disarming and when removing key from ignition. I know I will need another relay but unsure of the connections. All the lights are LEDs and will draw minimal current. Any input would be appreciated thanks.

juavos00

Copper - Posts: 66

Joined: August 05, 2003

Location: Texas, United States

Posted: May 05, 2010 at 10:05 PM / IP Logged

that would be sweet. I hope someone can answer your question as I may do that to mine aswell.. :)

jcs091570

Copper - Posts: 155

Joined: March 23, 2009

Location: Arizona, United States

Posted: May 05, 2010 at 10:16 PM / IP Logged

Well I actually figured it out. If you are interested..let me know. I had to use a separate relay.

juavos00

Copper - Posts: 66

Joined: August 05, 2003

Location: Texas, United States

Posted: May 05, 2010 at 10:30 PM / IP Logged

definitely.. Please post it up here, and I may give it a shot. Thanks

jcs091570

Copper - Posts: 155

Joined: March 23, 2009

Location: Arizona, United States

Posted: May 05, 2010 at 10:39 PM / IP Logged

Ok here it is, Pin 86 and Pin 30 go to fused constant 12v... Pin 85 goes to dome light output of alarm (Blk/Wht) and Pin 87 taps into 12v reverse light wire. I placed a 1 amp diode on the 87 wire with band facing towards reverse light circuit as a safety precaution. The reasoning behind this is when I put my car in reverse and the rev light wire shows 12volts, I don't want the current to possible damage the relay circuit. Current only allowed in one direction on that wire.

juavos00

Copper - Posts: 66

Joined: August 05, 2003

Location: Texas, United States

Posted: May 05, 2010 at 10:44 PM / IP Logged

jcs091570 wrote:

cool I may get around to trying this out, if I can get my keyless entry working in the first place.. lol

Anyway I know you might not know, but I want to ask anyway. Should I use a relay on the original domelight supervision output wire to the factory wiring? My DEI system shows that the output wire can drive circuits up to 30 amperes. If not, I found a website that shows me how to wire up a relay to protect the DEI brain.

jcs091570

Copper - Posts: 155

Joined: March 23, 2009

Location: Arizona, United States

Posted: May 05, 2010 at 10:46 PM / IP Logged

Oh by the way.. I used a standard Bosch 30/40amp 12vdc relay. Also, Pin 87a will supply 12volts when the relay is off. But when energized, it turns off. This can be handy to supply current to a device in your vehicle you wish to use when the alarm system is armed. I plan to hook it to my interior blue lights and Led lights under my vehicle to turn on when arming the car, and off when disarming. I will attach it to a switch to control when I want this function. Just watch amp draw on any circuit or relay.

jcs091570

Copper - Posts: 155

Joined: March 23, 2009

Location: Arizona, United States

Posted: May 05, 2010 at 10:48 PM / IP Logged

what model DEI alarm do you have? Some have the onboard relay and some don't.

juavos00

Copper - Posts: 66

Joined: August 05, 2003

Location: Texas, United States

Posted: May 05, 2010 at 10:51 PM / IP Logged

Avital 2101L

Its made by DEI

Also do I have to use the 87A on that circuit, or can I just leave it out?

jcs091570

Copper - Posts: 155

Joined: March 23, 2009

Location: Arizona, United States

Posted: May 05, 2010 at 11:00 PM / IP Logged

No you won't need that. Is your dome light (door trigger) circuit negative or positive?

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