2003 maxima, ultrastart 1270tl
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=91693
Printed Date: May 12, 2025 at 5:43 PM
Topic: 2003 maxima, ultrastart 1270tl
Posted By: peterubers
Subject: 2003 maxima, ultrastart 1270tl
Date Posted: March 13, 2007 at 10:58 PM
I need to use my GWR(-) to trigger several things in an '03 Maxima -- 1) Bypasskit immobilizer bypass 2) Antigrind relay How do I diode isolate it? Thanks ------------- The search function is your friend.
Replies:
Posted By: peterubers
Date Posted: March 13, 2007 at 11:00 PM
... it's a GREEN / WHITE wire in the SECOND wire harness behind the HVAC cluster It has a 12.4-ish voltage that needs a pulsed or latched negative(-). ------------- The search function is your friend.
Posted By: KarTuneMan
Date Posted: March 13, 2007 at 11:18 PM
Theres a FAT green wire in the drivers kick. POS(+) trigger....latched!
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Posted By: KarTuneMan
Date Posted: March 13, 2007 at 11:24 PM
 You want to be able to "put thru" ground, and NOT have any voltage "feed back."
Install your diodes on SEPERATE wires for each to be triggered with the cathod towards the device to be triggered. -------------
Posted By: the12volt
Date Posted: March 14, 2007 at 8:09 AM
KarTuneMan wrote:
...Install your diodes on SEPERATE wires for each to be triggered with the cathod towards the device to be triggered.
You want the ANODE side of each diode toward the device you want to receive ground from your ground while running wire. The cathode side (side with stripe) of each diode should be connected to the ground while running wire. -------------  the12volt • Support the12volt.com
Posted By: KarTuneMan
Date Posted: March 14, 2007 at 8:13 AM
It appears Im dyslexic....and wetahded.....looking right at the 3rd diagram....  -------------
Posted By: peterubers
Date Posted: March 14, 2007 at 11:29 AM
Hmm... good stuff... so I can use GWR(-) to relay 12volts(fused) from the engine to the this fat green wire?
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The search function is your friend.
Posted By: peterubers
Date Posted: March 16, 2007 at 1:08 PM
Installed an Ultrastart 1270TL in an '03 Nissan Maxima -- everything works flawlessly -- one catch: When you remote start and then remote shutdown without ever getting into the car to turn the key to "III" and hit the brake and start driving -- the auto headlights never shut off -- they remain on (presumably until the battery dies -- although I didn't wait that long). Is there a quick way to wire something such that the auto headlights will go off when I remote shut down? Thanks ------------- The search function is your friend.
Posted By: BNLUIS
Date Posted: March 16, 2007 at 1:16 PM
Yes look for the wire in your alarm / starter that gives a negative pulse when remote starter shuths down and connect it to the drivers door tigger wire at the BCM. I belive is light blue. This way when the remote starter shuts down it will trigger the the door thus making look like you opened the door and close it, then after about 30 to 35 second the auto light will shut down. Keep us posted.
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Luis
Sound Waves
Is up to the installer to test all wires with a DMM whenever possible.
Posted By: peterubers
Date Posted: March 16, 2007 at 2:30 PM
I'm not sure if the Ultrastart has a wire that pulses negative after remote shutdown -- I guess i could relay the signal from the horn wire (off the Ultrastart 1270TL) to the BCM and give that BCM door trigger wire a negative pulse (the ultrastart will honk twice after remote shutdown). thanks for the tip, will let you know how it goes ------------- The search function is your friend.
Posted By: BNLUIS
Date Posted: March 16, 2007 at 3:16 PM
NO, NO it has to pulse the door trigger after remote Start shuts off, look at the install manual, some times it is called a Factory rearm wire. I don't deal with this type of systems so I have no acces to an install manual. Or better yet turn you headlight switch from Auto to off  OK I found the manual it shows a Yellow wire in the 14 pin harness YELLOW 0.75 second pulse output when button is pressed and after remote start shutdown. Used for factory alarm re-arm. ------------- Luis
Sound Waves
Is up to the installer to test all wires with a DMM whenever possible.
Posted By: xtremej
Date Posted: March 16, 2007 at 4:28 PM
the 1270tl has 2 negative trigger status outputs, 1 off of the 3 pin harness on the side WHITE/ purple and the other is orange off of the main harness. no need to diode isolate.
Posted By: peterubers
Date Posted: March 16, 2007 at 4:44 PM
Ok .. so I can use the rearm NEG(-) pulse from the ultrastart 14-pin wire harness to trigger the light green wire (PIN 1 at the SECU) -- that should work.
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The search function is your friend.
Posted By: BNLUIS
Date Posted: March 16, 2007 at 9:55 PM
YES, The output should be strong enough, But if not then you will need a relay. Good luck
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Luis
Sound Waves
Is up to the installer to test all wires with a DMM whenever possible.
Posted By: peterubers
Date Posted: March 21, 2007 at 5:20 PM
a 1270TL that I installed in a 2003 Nissan Maxima SE has a defective trunk release trigger. When testing the trunk release wire (which should put out a 250mA negative pulse) .. the wire rests at 0.021vdc and then goes UP to 0.034vdc. It obviously should go to ground to trigger the trunk release mechanism. Clearly, I could get a new 1270TL module -- is there a device, however, that I could purchase -- like a switch/relay combo or something that would allow me to press the doorlock button twice or three times within a certain time frame to trigger the trunk? Thanks ------------- The search function is your friend.
Posted By: mikvot
Date Posted: March 21, 2007 at 5:23 PM
The unit doesn't have any other aux channels?
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Posted By: peterubers
Date Posted: March 21, 2007 at 5:27 PM
sadly, no ... one of the biggest downfalls of the Ultrastart lineup .. not much ability for add-ons.
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The search function is your friend.
Posted By: peterubers
Date Posted: March 21, 2007 at 5:29 PM
or is there a device that'll see that increase in volts in the trunk release wire (albeit a tiny increase) as a trigger to pop the trunk?
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The search function is your friend.
Posted By: peterubers
Date Posted: March 22, 2007 at 12:18 PM
any ideas...?
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The search function is your friend.
Posted By: BNLUIS
Date Posted: March 22, 2007 at 2:20 PM
Yes take the unit uot. Put something else.Viper, Audiovox, or any thing that seems to be a little more installer friendly. ------------- Luis
Sound Waves
Is up to the installer to test all wires with a DMM whenever possible.
Posted By: peterubers
Date Posted: March 30, 2007 at 12:03 PM
I have a 2003 Nissan Maxima w/ a negative (-) pulse necessary at the SECU on the trunk release wire to pop the trunk. The r/s brain will no longer drop the Trunk Release (RED / white) wire (US 1270TL) to ground when I press the dedicated trunk button -- but when I meter this RED / white wire, it goes from 0.012vdc to abuot 0.034vdc or so .. and the back down to 0.012vdc. Basically it fluctuates slightly up then down to rest at 0.012vdc. Can I rig something up with relays and some type of inexpensive voltage sensor to be able to harness this voltage fluctuation to create a trigger to send a pulsed (-) to the trunk release wire? Just being lazy/cheap about purchasing a whole new r/s brain. thanks ------------- The search function is your friend.
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