autopage rs 855lcd to turn on cargo lamp

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=94106
Printed Date: May 12, 2025 at 4:52 AM

Topic: autopage rs 855lcd to turn on cargo lamp

Posted By: cberger62
Subject: autopage rs 855lcd to turn on cargo lamp
Date Posted: May 20, 2007 at 11:53 PM

I have an Autopage RS-855LCD installed in my 2003 Dodge Ram. I would like the alarm to turn on the cargo lamp over the bed when it turns on the interior lights (when disarming).

Both the cargo lamp and the interior lamps are ground switched. Can someone tell me what wire on the alarm is the dome/supervision output. I need to know how to wire the output to the cargo lamp. Also, would I need to use diodes on the ground wires when I tap into the cargo lamp circuit.

Thanks in advance.

Replies:

Posted By: enice
Date Posted: May 21, 2007 at 12:33 AM

First use a relay for this to give proper current. The dome supervisoin light is a brown wire at the driver A pillar. As for the cargo lamp I would suggest to go direct to the lamp and check what is pulsating it to turn on and follow the wire to make a comfortable connection. You mentioned earlier that the cargo lamp is ground switched so to answer your question I would say yes. Use diodes for this.

Posted By: cberger62
Date Posted: May 21, 2007 at 11:46 AM

Thanks but I don't need to know which wire on the truck is the dome light wire. I need to know which wire from the alarm is the interior illumination output.

Posted By: accessdenied
Date Posted: May 21, 2007 at 12:32 PM

It's the White wire (pin 12) on the 20 pin harness for the RS860lcd

Here's the install manual for future references posted_image

Good luck...

Posted By: accessdenied
Date Posted: May 21, 2007 at 12:34 PM

opps... forgot to paste...

https://www.autopageusa.com/resources/RS855LCD_Install_rv72104.pdf

Posted By: cberger62
Date Posted: May 21, 2007 at 7:19 PM

Thanks. Now I need to find which wire coming from the swithc panel on the dash controls the cargo lamp...any ideas?

Posted By: accessdenied
Date Posted: May 22, 2007 at 9:23 AM

I don't see that wire in any of the diagrams I have so this has to be done as a custom install. I would go with enice's suggestion to search for that cargo lamp wire over the bed. When you find it, use a relay and diode isolate it with the dome light wire from the interior light circuit. Wiring should be easy once you find that cargo light wire..

Good luck.