must choose trunk release or dome light?

Hello

I just finished my first remote start. The car is 99 Camry and remote start is older Code Alarm CSI-400. Everything is fine. I also installed power trunk release kit to be able to use remote trunk release. Everything works great. Remote trunk release works great too... I should have done that 9 years ago when I bought the car.

Anyway, I am thinking about getting a remote start that has ignition controlled door lock and dome light supervision. CSI-400 doesn't have those features. I am doing reading and found out while some systems seem to have separate wire for trunk release and dome light, lots of systems (e.g. Ultra Start U1272-XR PRO) use the same aux wire for trunk release and dome light, and I have to choose between trunk release or dome light in the feature programming. So, does it mean if I take the system that use the same aux wire for trunk release and dome light I must choose either one and I can not have both?

I'd like to get some confirmation from some experienced gurus.

I thought all had both but if I'm wrong then DEI has separate.
Does your dome light stay on when you shut the door and go out when you lock the vehicle? If so you don't need dome light supervision.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

The Ultra Start U1272 can be setup to do both, a trunk release and a dome light supervision output.  However the
trunk release would come along with a door unlock.
The default setting for AUX1 ( Black wire to trunk release ) will do the following.  Press and hold the # button for
3 seconds.  The U1272 will output a disarm pulse, unlock the doors and pop the trunk.
The AUX2 output can then be programmed for Option 1 - Dome Light Output using the RED / White wire.

Does the 99 Camry need dome light supervision?  Most newer cars have this built in.  Test this by unlocking the car with the factory
remote and checking to see if the dome light comes on.  If you don't have factory remote keyless entry, just manually pulse the
unlock wire ( with the correct polarity signal ) that the Code Alarm is currently using.

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Soldering is fun!

That's what I thought before going to manufacturers' site and looking at their installation manuals. Here is link to Ultra Start 1272-XR in PDF
https://www.ultrastarters.com/manuals_download_pdf/2009/U-72-INSTALL-2009.09.19.pdf.

I was looking at Avital 4103 and found out it doesn't have dome light feature at all.

My car's dome light does not come on with unlock. I actually physically have to open the door to get dome light. Worst come to worst, I'm thinking to wire the unlock to door trigger with a diode.

Please let me know if I am way off. Thanks.

howie ll wrote:

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I thought all had both but if I'm wrong then DEI has separate.
Does your dome light stay on when you shut the door and go out when you lock the vehicle? If so you don't need dome light supervision.

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Yep, that is the manual I use for the newer U1272s.  It will work connected as described above.   Black wire for trunk release and RED / White wire for dome light supervision and change that one programming option.  Not familiar with the Avital products, sorry.

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Soldering is fun!

I think I know what you are saying. But, here is the link to U1272 installation manual https://www.ultrastarters.com/manuals_download_pdf/2009/U-72-INSTALL-2009.09.19.pdf. According to the manual, I need Aux 1 for Car Finder. I don't want to give up Car Finder feature either.

I have to physically open the door to get dome light from my 99 Camry. Unlock won't do. How do I manually pulse the unlock wire? Do I just wire unlock to door trigger? If so, do I need diode to prevent electricity flowing both way. Yes, both unlock and door trigger are (-) polarity. Thanks.

kreg357 wrote:

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The Ultra Start U1272 can be setup to do both, a trunk release and a dome light supervision output.  However the
trunk release would come along with a door unlock.
The default setting for AUX1 ( Black wire to trunk release ) will do the following.  Press and hold the # button for
3 seconds.  The U1272 will output a disarm pulse, unlock the doors and pop the trunk.
The AUX2 output can then be programmed for Option 1 - Dome Light Output using the RED / White wire.

Does the 99 Camry need dome light supervision?  Most newer cars have this built in.  Test this by unlocking the car with the factory
remote and checking to see if the dome light comes on.  If you don't have factory remote keyless entry, just manually pulse the
unlock wire ( with the correct polarity signal ) that the Code Alarm is currently using.

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Use the unlock wire to pulse a timer relay such as a 528t, but you will also need a small relay as an ignition interlock.

-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Yes, doing it that way will lose the Car Finder feature.  The Ultra Start units are very reliable and include some nice features but are limited in AUX outputs and their programming flexibility. 

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Soldering is fun!

Thanks for info. I will look into 528T. This gives me some idea and I also found this topic after reading your post.

https://www.the12volt.com/installbay/forum_posts.asp?tid=75231

howie ll wrote:

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Use the unlock wire to pulse a timer relay such as a 528t, but you will also need a small relay as an ignition interlock.

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This confirms my suspicion. Thank you.

kreg357 wrote:

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Yes, doing it that way will lose the Car Finder feature.  The Ultra Start units are very reliable and include some nice features but are limited in AUX outputs and their programming flexibility. 

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Don't think that's true, I read that post and he had a crappy POS Italian alarm, the car was either an Audi or a Mercedes, different locking system to the Camry, take a 528t and wire as follows:
Lock wire to BLACK/ white.
12V+ constant at 5 amp fused.
Ground to black and yellow.
Brown to door trigger.
Orange not used.
Adjust the pot on the 528t for the time you need.
Far as I can tell, you won't loose your car finder.
You could even use another 528t in conjunction with your
LOCK wire to give you a car finder, just press the lock button on the remote.

-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

opting for the dome light and have the domelight wire also control a relay the would temporarily divert the unlock wire to become a trunk pop wire would work too.

i have done it lots of times with old dei units where i wanted another channel.

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yuk
quiet rural missouri, near KC.
If your system moves you physically and not emotionally, you have wasted your money.

You gave me a number of options with 528T relay timer.

But, I am not quite clear on the last part about hooking 528T to lock wire. Does it put it in car finder mode every time I lock the car via remote transmitter?

Thanks.

howie ll wrote:

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Don't think that's true, I read that post and he had a crappy POS Italian alarm, the car was either an Audi or a Mercedes, different locking system to the Camry, take a 528t and wire as follows:
Lock wire to BLACK/ white.
12V+ constant at 5 amp fused.
Ground to black and yellow.
Brown to door trigger.
Orange not used.
Adjust the pot on the 528t for the time you need.
Far as I can tell, you won't loose your car finder.
You could even use another 528t in conjunction with your
LOCK wire to give you a car finder, just press the lock button on the remote.

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Thanks for the post. Because I have very limited experience with these, I am having a hard time following your thought.

Did you mean to say that option for dome light and trunk have dome light wire? Could you explain to me again, please? Thanks.

itsyuk wrote:

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opting for the dome light and have the domelight wire also control a relay the would temporarily divert the unlock wire to become a trunk pop wire would work too.

i have done it lots of times with old dei units where i wanted another channel.

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 this particular suggestion is for interior lights that are constantly powered and ground through a pillar switch or body control module... other systems will need retweaking to make it work for them...

since your alarm has dome light supervision ...

if you constant power an extra relay and have its ground tie into the cars interior light ground wire.

then run its 30 terminal to the unlock wire from the alarm.

87 would go to a relay that triggers the trunk popper.

87a would go to the door unlock relay.

Anytime the door is open OR the domelight supervision relay is active... pushing the unlock button on the remote will pop the trunk instead of unlocking the doors.

i have used this on lots of mostly GM cars over the years.

it only needs to be a regular relay.

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yuk
quiet rural missouri, near KC.
If your system moves you physically and not emotionally, you have wasted your money.

here is a crop from a pic back in the days when i used MSPaint to make wiring diagrams and stuff....

it is the same principal but i used it to activate an early series 551T remote start from an alarm that had no extra channels.

as long as the door wasnt open or the domelightsupervion wasnt on, the car would start instead of popping the trunk.

dont pay attention to the colors. most cars i did had their own unique color scheme to them, i would remove all the wires and put them where they werent originaly, just to make it harder for the bad guys.

and "screw-u loops" were implemented whenever possible.

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yuk
quiet rural missouri, near KC.
If your system moves you physically and not emotionally, you have wasted your money.

Took me awhile to figure it out. This post and the post with the diagram really help. I am pretty sure I've got it. Very smart idea! That's the difference between a pro and an amateur like me.

Just to make sure, I would be pressing unlock button twice to pop the trunk with this approach and the Aux button (trunk) button on the remote is not used anymore. Am I right?

Thanks.

itsyuk wrote:

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 this particular suggestion is for interior lights that are constantly powered and ground through a pillar switch or body control module... other systems will need retweaking to make it work for them...
since your alarm has dome light supervision ...
if you constant power an extra relay and have its ground tie into the cars interior light ground wire.
then run its 30 terminal to the unlock wire from the alarm.
87 would go to a relay that triggers the trunk popper.
87a would go to the door unlock relay.
Anytime the door is open OR the domelight supervision relay is active... pushing the unlock button on the remote will pop the trunk instead of unlocking the doors.
i have used this on lots of mostly GM cars over the years.
it only needs to be a regular relay.

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Yes.

-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

correct!!

I certainly cant take credit for coming up with the idea .... but i will take credit for remembering it. .....LOL

and if you had an alarm with 4 extra channels you could use a single 4PDT relay and flip all 4 channels for 4 more options. been there and done that too!!

the only major downside is that the if it is an option that needs the have the button(s) held down, the function must be a less amount of  time than the DLS time..

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yuk
quiet rural missouri, near KC.
If your system moves you physically and not emotionally, you have wasted your money.

Thank you howie ll and itsyuk. You guys gave me lots of options and confirmed what I could and could not do. I am sure this will help the next newbie with similar questions. Thank you all.