sunroof closing, my car's switch turns off auto

Ok i'm trying to hook up a relay(s) to close my sunroof with my alarm.

The nice thing is that my sunroof is a negative trigger close.. also the relay shuts off when the sunroof is fully closed so i DON'T need a window module.. like if i keep pressing on the close button there is no more current...

anyways, anyone have any idea how to hook up relays for this from a negative pulse alarm output?  i saw the applications on this site about the momentary to constant... i tried it but my sunroof switch current is too low to energize the coil of relay.. anyway i can amplify the current? etc? tips?

To boost a (-) signal you need to wire a relay in this configuration:

Make sure that the wire your using to trigger the relay ( pin 85 ) has a long enough latched time to actually close the sunroof completely otherwise you will need to press the remote button again to close it the rest of the way.

problem is i want like a one touch close... cuz the output on the alarm is like 1 sec.... 

i even tried the momentary to constant thing (latch diagarm i think on the special applications) but i used the sunroof trigger as the power source for the coil but was too weak... is there another relay that will activate upon lower currents?

The above diagram will boost any ground signal so that it will give it a solid ground when activated. You will need to have this relay just before the  momentary to constant relay in order for it to work properly.

the above diagram you posted was just the alarm trigger to one side of coil and 12v constant other side which energizes the N/C circuit and gives ground to the sunroof..

yes i know that's how it works.. but what i'm saying is i need the relay to stay on until it's closed by itself, therefore doing the momentart to constant thing.  i substitued the 12v constant with the sunroof negative trigger since basically it's a live wire through a load, the problem is that the current isn't enough to actiavet the coil.

i don't know, maybe you can explain your solution better.. i'm getting more confused now... don't worry about terms.. i'm in electrical engineering so i know this stuff. thanks

Does the unit that your installing have a negative when armed wire ? Even better yet, you can use the starter disable wire to activate the relay as this is a negative output for as long as the system is armed automatically, unless you want to be able to remote activate it manually.

yes i want to remote activate it...

what can i do? use a capacitor?

The only problem that I see is if the relay stays energized even though the OEM sunroof  relay shuts off. This means that the relay will constantly draw a current from your car until the battery is dead. The only other possibility that I can see is that you can use the relay that I described to boost the 1 second pulsed signal from the alarm and the pin 30 on that relay will go to pin 86 on the momentary to constant relay . You will then need a relay or a signal from the factory sunroof ( - or + ) to deactivate the momentary to constant relay. Does this make sense ? In my mind it does, but see if this works for what you need.

go to www.radioshack.ca

search for relay...

see how's there's lower amperage relays? can i get one of those and use it? this is how i propose to use it

ok the wire from the sunroof (negative trigger, which means if grounded, sunroof closes) goes to -85

alarm wire trigger - 86

87 - connecting a wire to 86

30 - ground

now as you can see.. using the sunroof wire as a 12v lead to energize the low amperage coil.. then the relay will stay on until the sunroof oem relay cuts off the 12v which turns it off... but i just need to know if those relays at radioshack is small enough amperage or not? or too small might blow it? ti's only $1.00 so it's ok... get back..

and i think the oem relays use those small amperage relays as well