Headlights

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=39695
Printed Date: May 15, 2024 at 4:27 PM

Topic: Headlights

Posted By: Malibu2882
Subject: Headlights
Date Posted: September 24, 2004 at 6:18 PM

Ok, I have a 1999 Malibu, with a factory aftermarker GM alarm. I was trying to have to headlights come on when I disarm just like my domelight already does. So I wired up the relay to my neg.headlights like so.

87 Ground , 85 12volt, 30 Negative headlight wire, 86 negative alarm illumated output.

now when I disarm, just the domelight comes on not the headlights also. but if I take a ground wire and touch the negative alarm output (86) they come on, and time out just like the domelight like it should. I have so clue whats up? Please help! thnks

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Dave

Replies:

Posted By: hagmanti
Date Posted: September 24, 2004 at 11:03 PM

Is 86 hooked up to the dome light supervision output _and_ the dome light wire?

If so, put a DMM across that connection, and disarm. I'll bet that wire's not going to ground... (because of the dome light circuit).

Fairly easy fix:

85 12V, 86 dome light supervision (only), 85 12V, 30 Negative headlight wire (low current only!) and negative dome light wire (low current only!) diode isolate.

Or, two relays...

Me

Posted By: Malibu2882
Date Posted: September 25, 2004 at 2:25 AM

no the domelight wire (-) is on 30 on it's own relay. I tried using 1 relay and diode the domelight wire and headlight (opening the door would make the headlights come on) It worked fine but the diode got VERY hot . Right now I have 2 relays...one for domelight supp. and one for the headlights

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Dave

Posted By: djfearny2
Date Posted: September 25, 2004 at 3:34 AM

here simple fix and this will work for you.,

two relays.

two diodes

ok now

take your domelight supervison wire since it is negative and twist the stripes side of the diodes together and attach them using one butt connector to the dome light supervision wire from the alarm. now you should have to negative signals comming from each of the diodes when you press disarm both ends of the diodes should show ground.

pin 86 on both relays give 12 volts fused constant.
pin 87 on both relays give ground
each didode should connect to pin 85 one for each relay
pin 30 is the outputs connect one relays output to the dome light supervision wire. and the other relays output to the negative headlight wire which has to be negative and does not reqire key in igniton.

that it now when you press disarm, and turn off igition the domelight and headlights will come on.
also if you set the alarm off after completion the headlights should flash.

any more help or for a diagram email me at nyinstaller@netscape.net

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Jon
Installer/Help Technician
---coral springs florida---
mecp certification is not always needed. I have it and it has not helped me out at all. my experience out shines it.