240sx door triggers, positive or negative

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sammyworth

Member - Posts: 4

Joined: November 19, 2002

Location: United States

Posted: November 19, 2002 at 5:20 AM / IP Logged

Im going to install an alarm in my 90' 240sx SE.

My alarm manufacturer is asking whether I have a "positive" or "negative" door switch trigger input (the wire to the door pin switch which supplies the on/off power to my dome light when door is open). How do I find out? Is this info in the car manual? We can't find it in the Chilton.

Any help would be greatly appreciated. Thanks!

skerr

Copper - Posts: 52

Joined: November 08, 2002

Location: United States

Posted: November 19, 2002 at 6:03 AM / IP Logged

Test each wire with a DMM, for example stick the positive lead to 12v, then test the dome light wires with the negative lead and see if the meter registers 12v when the door is open & 0v when the door is closed. If 12v is present with the door open then you have negative trigger. Switch the leads and test again for positive.

Shawn

Velocity Motors

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Joined: March 08, 2002

Location: Manitoba, Canada

Posted: November 19, 2002 at 9:20 AM / IP Logged

DOOR TRIGGER----------RED / white-------------| ( - ) trigger |-----------found at the courtesy light

Jeff

Velocity Custom Home Theater

Mobile Audio/Video Specialist

Morden, Manitoba CANADA

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sammyworth

Member - Posts: 4

Joined: November 19, 2002

Location: United States

Posted: November 20, 2002 at 6:34 AM / IP Logged

hey, thanks alot for the info gentl;eman, i will keep you all posted,

seee-yaaa

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240sx door triggers, positive or negative

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