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Old 02-06-2003, 07:01 PM   #1
WRXmy02
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02 Wrx

Default Trunck light to 12v...?

Wrx has a light in the trunk. I want to cut the wires and put in a 12volt adapter...I have the wire diagrams {Suabru wire manual} but lack a bit in the electrical field. Please note the I would like to use a 12" neon light in the 12v socket..not alot of power draw.
I need a bit more light because I have a telescope that is not
exactly small..lots of packing and upacking in the trunk area in the dark.
Will e-mail wiring specs {fuse,amps and such} or post them if needed. I know what wires to to wire but I'am not sure if I will "overload" something.
Your thoughts?
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Old 02-07-2003, 01:21 AM   #2
Bimmer
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STOP, don't cut anything.

First, we're way beyond the days of cutting wires and wrapping them up with electrical tape.

My suggestion: leave the light in the trunk as it is, and use "vampire" connectors to tap into the wires to it. This way you don't cut anything, and if you remove the connectors, it's all like it was before hand.
You should be able to buy a 12v accessory jack (cigarette lighter female) at Radio Shack or at the auto parts store... or you could hardwire in your neon light.

If you DO want to remove the stock trunk light, then remove the light (however that works in the sedan) and UNPLUG it. There are connections and plugs everywhere, and they're shown in the wiring diagram volume of the FSM... I'm sure there's one there near the light, because there is in the wagon, and the guys installing the trunk light kit in their RSs have to have somewhere to plug theirs in, too.

As far as overloading anything... I wouldn't worry about it unless you start blowing fuses (unlikely). You could check the amperage of the light you want to install, and make sure it's not more than the fuse that the trunk light runs through.

Ben
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Old 02-07-2003, 02:29 AM   #3
CosmoTheCat
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Vampire taps are pretty half-baked if you ask me. They tend to slice into the wire and make it weak. I highly recommend just making the cut and using butt connectors or if you have to, wire nuts and tape.
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Old 02-07-2003, 01:38 PM   #4
Bimmer
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Quote:
Originally posted by horatio102
Vampire taps are pretty half-baked if you ask me. They tend to slice into the wire and make it weak.
Not true. When used correctly, vampire taps will hardly leave a mark on the tapped wire. They'll cut through the insulation, but this doesn't make the wire "weak."
If you use connectors that are too small, or if you don't get the wire centered in the tap, then, yes, you'll wind up crimping or slicing the wire, otherwise, I don't see the problem.

Ben
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Old 02-07-2003, 03:12 PM   #5
jeffg
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and NEVER NEVER NEVER use wire nuts in a car. They WILL work loose and short out the wire.

I fixed so many electrical installs that used wire nuts its not even funny.

Spend the extra 89 cents and get real crimp connectors.

J
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Old 02-07-2003, 06:39 PM   #6
CosmoTheCat
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I've only seen 2 or 3 different sized vampire taps, meaning you have to use the next-smaller tap for the wire you're working on. If you shove a 10ga wire in a 12ga hole, you're going to lose some strands. And when you remove the tap you have two small bare spots on the wire that can short out given the right situation.

Vampire taps work in a pinch, but it's still much better to do it the right way. Same thing with vampire taps for water lines - like the ice-maker kits for refridgerators. If somebody bumps the tap you're going to have water all over the kitchen. It's better to cut the pipe and put a fitting on that won't fall off.

Jeff- I agree that wire nuts aren't good, but if taped properly they won't come off. I still won't even use them on my car though.
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Old 02-08-2003, 02:03 AM   #7
kenchan
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neons take a while to turn on in cold weather so you might
want to consider other options such as using a brighter bulb
or wiring up a wedge or something.
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Old 02-08-2003, 02:31 AM   #8
Basshead
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plastic - crimping - bah...do it right with heat shrink and solder...
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Old 02-08-2003, 03:30 PM   #9
Alan
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For a couple of years I was an avionics technician, and FAA licensed to work on any aircraft. I still like to use aircraft techniques, as they are designed to make really good permanent repairs or modifications.

The ONLY two ways to splice a wire that are FAA approved to make aircraft quality splices are using crimped connections, or soldered with heat shrinked insulation.

For automotive low current applications you can use other means like vampire taps, but they are really inferior in terms of permance, strenght, security, corrosion, vibration and contact resistance.
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Old 02-08-2003, 05:46 PM   #10
sidewayz
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Quote:
Originally posted by Basshead
plastic - crimping - bah...do it right with heat shrink and solder...
AHMEN!!
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Old 02-08-2003, 10:51 PM   #11
WRXmy02
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Well then,
vamps get the silver bullet and crimped connections are in.
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