yet another scanner led question

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drd4life

Member - Posts: 19

Joined: May 10, 2003

Location: Canada

Posted: July 08, 2003 at 4:46 PM / IP Logged

I'm sure someone has already answered this, but here it goes. How can I wire a three wire scanner to light up when the car is off, without an alarm? (by three wire I mean 12v+, ground, and trigger.) I already shorted a scanner wiring it to my alarm's negative output, (however the starter kill was also on, I guess it can't be wired like that) So I now disconnected the starter kill and wired the trigger wire from the scanner to the negative output of the alarm, 12v+ to a constant lead, and ground to a good ground. Now the scanner is always on, alarm on or not. Any ideas?

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xetmes

Silver - Posts: 586

Joined: May 18, 2003

Posted: July 08, 2003 at 5:09 PM / IP Logged

If the trigger is a negative trigger i would use a relay and wire as so:

Terminal 85 : Ground

Terminal 86: Ignition (+ while car is on)

Terminal 30: To trigger on scanner

Terminal 87: +12 V

Terminal 87a: Ground

It would then be off while the car is on, and on while the car is off

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HondaTypeSE

Member - Posts: 7

Joined: July 06, 2003

Location: United States

Posted: July 08, 2003 at 8:11 PM / IP Logged

i did this with +12V to 30, ignition t0 85, ground to 86 and trigger to 87a so that its on when car is off, and goes off when u start it.

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drd4life

Member - Posts: 19

Joined: May 10, 2003

Location: Canada

Posted: July 09, 2003 at 8:52 AM / IP Logged

Sounds good. thanks guys!

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yet another scanner led question

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