compustar into lexus sc

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menappi

Member - Posts: 25

Joined: January 22, 2004

Posted: July 26, 2007 at 5:23 PM / IP Logged

Hey all, I need a little help installing my compustar alarm into my 93 sc300. I have attached a picture of the wiring diagram for the alarm and the vehicle wiring diagram. Not sure exactly which wires go where, I have done two other alarm installs but they were in my honda and the viper diagram seemed a lot easier to understand. If someone could maybe draw lines on my image to where i connect each wire that'd be great!

compustar into lexus sc -- posted image.

peterubers

Silver - Posts: 706

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Joined: December 29, 2006

Location: United States

Posted: July 26, 2007 at 5:54 PM / IP Logged

CN1-3 = White

CN1-4 = chassis ground

CN1-1 = red wire of siren (black wire of siren = chassis ground

CN1-2 = not connected

CN2-1 = GREEN/ blue (-) at steering column harness (not listed in your diagram)

CN2-2 = GREEN/ red (-) at steering column harness

CN2-6 = BLACK / YELLOW

CN2-9 = green(-)

CN3-2 = RED / white(-)

CN3-3 = RED / white(-)

CN4-2 = need to use relay as follows (BLACK/ silver dots lexus wire)

---> 85: CN4-2 wire

---> 86: 12 fused volts

---> 30: 12 fused volts (10 amp fuse)

---> 87: BLACK/ silver dots wire of lexus (+)

CN4-4 = GREEN/ blue (-)

CN4-5 = RED / black (-)

If you want to use the CN3-1 hood pin sensing wire, you'll have to purchase an aftermarket hood pin and connect it to this wire.

CN2-5 (starter kill) will have to be used with a relay again, and you'll have to split the starter wire (BLACK/ white) in two:

85: CN2-5

86: 12 fused volts

30: key side of BLACK/ white wire

87a: motor side of BLACK/ white wire

87: nothing

hope this helps, best of luck -- it's a real straightforward install

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dswift

Copper - Posts: 396

Joined: March 12, 2007

Location: United States

Posted: July 26, 2007 at 6:04 PM / IP Logged

deng.... hahah For future reference the my man who posted this. The wiring diagrams are used for a reference only. Always test before you start connecting things. Word

"dont ground out!"

menappi

Member - Posts: 25

Joined: January 22, 2004

Posted: July 29, 2007 at 7:03 PM / IP Logged

Hey thanks a lot. for the 'trunk output' where you say I would need a relay, I don't need that option do I? I'd rather just leave off a remote trunk pop. And with the starter kill, I can use the relay that came with the alarm right? It's alreayd attached to the harness. Also how did you know the wires for the parking lights and horn output if the wires aren't on the diagram?

P.S.-any idea how to get my siren wire through the firewall. I found a hole on the passanger side but can't get it to come through.. :(

menappi

Member - Posts: 25

Joined: January 22, 2004

Posted: July 31, 2007 at 10:37 PM / IP Logged

Bump, having some trouble (sorry ultimate noob, but I want to learn). Factory disarm wire, says it's green in the 'kick panel', but man there are like a hundred wires in the 'kick panel', a huge mess of harnesses. Anyone have any more specifics? How does one test these wires to make sure they are right, for instance, the factory disarm, or the door unlock lock, like if there was more then one color (does that happen?)

menappi

Member - Posts: 25

Joined: January 22, 2004

Posted: August 01, 2007 at 2:27 PM / IP Logged

Sorry another Question about the factory disarm, when/if I find it, do I CUT IT and hook it up to the wire from the brain, or do i splice the wire from the brain into it?

enice

Silver - Posts: 857

Joined: March 05, 2006

Location: New York, United States

Posted: August 01, 2007 at 2:49 PM / IP Logged

This is where a multimeter is an installers best friend. To test the factory disarm you would have to connect your red test lead to that wire, black lead to ground and have it on DC settings. Turn the key cylinder. Your meter will show a read everytime you turn the key in the door cylinder. It could go from a voltage between 7-12 and drop down to 0v when the key is turned in the door cylinder to unlock.

menappi

Member - Posts: 25

Joined: January 22, 2004

Posted: August 01, 2007 at 3:00 PM / IP Logged

So when I find the right wire, do I cut it and hook it to the 'disarm output' on the alarm, or splice the wires? while it's still hooked to the harness?

enice

Silver - Posts: 857

Joined: March 05, 2006

Location: New York, United States

Posted: August 01, 2007 at 3:22 PM / IP Logged

tap into it. do not cut

menappi

Member - Posts: 25

Joined: January 22, 2004

Posted: August 02, 2007 at 11:06 PM / IP Logged

Thanks, ok I wired up everything EXCEPT-

factory disarm (green wire in kick panel)-Have no clue where it is, there are a gillion green wires, anyone know which plug it's in????

HORN/Parking lights (steering column harness?) - Can't find these wires

door trigger (RED / white) - Found TWO red white, one goes into the door the other doesn't but I'm not sure which one it is, i don't want to hook it up wrong and later come back. Also don't know how to test.

Now it seems that my interior lights don't work at all, after pulling plugs and all this...any help?

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