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.

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 theunlock wire ( with the correct polarity signal ) that the Code Alarm is currently using.

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 http://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: 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.

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.Soldering is fun!

I think I know what you are saying. But, here is the link to U1272 installation manual http://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: 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.

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.

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. 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: 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.

This confirms my suspicion. Thank you.

kreg357 wrote: 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.