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

it's a honda.. but same thing. yes it must be powered.. i was planning on finding the wire and putting it for constant 12v or either making a relay to do it...

so anyone know about my idea about the low amp relays?

What kind of unit are you installing ? Is there a pdf. for this system that I can look at ?

86 to (+) motor wire output of factory module
85 to ground
87 to ground
30 to switch

So, basically when you press the switch, the roof starts to close applying power to pin 86, energizing the relay. Pin 30 will then supply ground back to the switch even when you let go of it. Since you said the relays/module turns off when roof closes, power going to pin 86 turns off, so relay also turns off. Of couse you mentioned that you will supply constant power to the sunroof module when the car is off.

but the problem is that wire is the end of the load... ahhh here

(-+) power 12v source ---------------------------------------[SUNROOF MOTOR LOAD]---------------------------(switch for grounding to activate sunroof)

so you get it now? i'm using the other side of the load which is probably very very low current and that's why i can't just a 30/40amp relay and was asking those relays at www.radioshack.ca is ok for the low current etc...  can someone help me now?

is this what your vehicle wiring is like?

https://www.go2pac.com/misc/miscdiagrams/sunroof.jpg

Yes it is reverse polarity. Your switch needs YOU to activate it, not ground. The switch has nothing to do with 12v. The switch completes the path for the coil to ground which the other side of the coil is 12v.

The problem with this setup is that if you can't tap into the circuit between the circuit break and motor, you won't be able to shut off the latching relay. Your only solution is to get a sunroof module. Now if you could, then my post above would work.

sh*t! i figured it out... here's the diagram

85- negative trigger from alarm + wire to 87 + sunroof close switch

86 - 12V from sunroof relay (ONLY when sunroof closes it switches on, and switches off when sunroof is fully closed), also diode to prevent reverse current since the 12v from relay acts as ground due to rev. pol wiring.

87 - wire to 85

30 - ground

there it is... it's also considered a one touch roll back thanks to the oem honda circuit breaker to turn off the current when it's fully closed.... this applies to all hondas

also you gotta run a constant 12v to power the relay or use another relay to power up the relay.  also make sure you got diodes

Your diagram can't apply for all hondas. Even though the circuit breaker shuts off, the factory relay and latching relay will still be on and eventually drain the battery. If you have a module ( which it seem like you have) that senses current and shuts off automatically then your diagram would work.

P.S. If you wired the relay like my first post then you would not need a diode.