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Thread: Wire Gauge (not mains to PC)

  1. #1
    Maximum Bitrate KyleYankan's Avatar
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    Wire Gauge (not mains to PC)

    Hey everyone, I have a few question. I'm about t ogo out to my minivan and start planning how I want to hack into it's electrical system. My first question is adding a relay to the dome lights. What gauge wire should I use? Is there any easy way to find out how much draw my lights are using, so I can use an approiate relay (yeah - Im probably just going to use my super-mundo 10 amp one here), or is there somewhere I can find the information?

  2. #2
    Takes it in the Rear kevinlekiller's Avatar
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    Well a bulb in a dome light takes about 5w of power at 12 volts, so thats about 0.4 amps (5/12)

    Edit: Im kind of confused about your question; What do you want to do with a relay in the dome light? Use it for a screen?

  3. #3
    Maximum Bitrate KyleYankan's Avatar
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    no - adding a relay to control the dome lights.

    Additionally: I went out to find a spot to tap into my dome lights. I checked both fuse boxes and nothing. Does anyone know where there routed to in a 1995 dodge caravan?

  4. #4
    Takes it in the Rear kevinlekiller's Avatar
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    I have the same van , its like interior lighting(the name) or something. I dont remember if its the box outside or inside.

    Edit: Sorry for asking this (im kind of slow today) Why do you want a relay to controll the dome lights? I thought they opened when you open the door.

  5. #5
    Maximum Bitrate KyleYankan's Avatar
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    Yes, but I wanted to have the hooked up in parallel with a wireless relay controller with a keyfob. That way I can throw my lights on before I get in the car. My girlfriend always gets freaked out thinking someone is in the back. This way I can throw the lights on and look before I get in the car. Save some time.

  6. #6
    Takes it in the Rear kevinlekiller's Avatar
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    I see , thats a great idea.But I dont think its going to be easy to find were the wires go. But maybe you can pass some new wires (taking out the headliner and the plastic on the sides.)

  7. #7
    Maximum Bitrate KyleYankan's Avatar
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    Well, I found out which fuses will control it. The "Engine off Draw" 15amp fuse in my engine compartment. I think I'll be better off opening my fash again and running the wires from the acutal switch. I still need to figure out what gauge I want to use. I have 5 dome lights. 3 o nthe rooof, and two on the hatch that light up. I'm probably going to radioshack and just buy some "test lead" wire and use that.

  8. #8
    Maximum Bitrate fixerofallthing's Avatar
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    the dome lights on your van are turned on and off by the pin switches in the doors and they control a ground signal to the BCM(body control module). you can simply pull on of the switches out and tap into it with a relay set to apply groung. a bosch relay would work great. the other option would be an inexpensive keyless entry system that would do locks and lights and not use the factory fob anymore.
    The Car 2005 Scion xB

    The Truck 2004 GMC Canyon

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    Maximum Bitrate fixerofallthing's Avatar
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    The Car 2005 Scion xB

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  10. #10
    Maximum Bitrate KyleYankan's Avatar
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    Actually - that's not a bad idea. however I just installed a keyless entry and electric locks

    However - I don't want to replace it. I only have to do this now and then (parked with GF). I figured I would just use a channel on the key-fob I already have.

    However I love the door Idea. I still need to open up the sliding door to install the electric locks. Perfect time to do it.

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