Wiring in rear defrost for new remote starter (resolved)

Hi everyone! I'm new to the forum. Great ideas and suggestions out there.
I recently installed a Crimestopper RS4-G5 Remote Starter on my 1995 Buick Lesabre. Everything works. The remote starter powers the following: starts the engine, runs the parking lights to confirm the car has started, beeps the horn 3 short times prior to starting to confirm the signal from the fob reached the starter computer, runs the heat blower as long as I manually leave the heat on and the heat blower speed manual switch on high. Also has a trunk release option that works.
So, here is my one and only concern/question/project:
How could I activate/wire in my rear defrost to come on when the remote starter starts the car? As it stands now, the remote starter starts the car, powers the parking lights, heater fan blower and engine of course. Here is my problem...
I leave the rear defrost on prior to shutting off the car. When starting the car with the remote starter the defrost is off, not on as I left it the night before.
Here's an important point you need to know. If I use my key to start the car, keeping in mind I left the rear defrost on the night before, the rear defrost is still off. Meaning regardless whether I use my key to start the car or use the remote starter fob to start the car the rear defrost light will not stay on even though I left it on the night before. It's important to note that once the vehicle is on with the key at normal operation the rear defrost works fine. The rear defrost is a single push button control for on and off.
So this is not a complaint about the remote starter, this is a question on how to wire the rear defrost to stay on while using the remote starter so the back window can defrost ice and snow. I do have a brand new relay not being used so I'm sure with some help i can figure it out. I can't find the correct wiring diagram for a 1995 Buick Lesabre showing the correct color/colors of wires feeding the rear defrost switch. THANKS SO MUCH for any and all help!


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AWB

You can use an aux output. If you don't have one available, you can get creative and use the negative lock signal.   You would connect the banded end of 2 diodes together and connect that end to the lock signal from the Crimestopper. The other end of the diodes will create 2 signals--connect one to your door locks and one to the momentary defrost signal. Anytime you press lock while the car is running, you will toggle the defrost signal. It won't hurt anything to toggle the defrost wire while the car is off, and when started, this allows you to control the defrost as desired.

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Lectric Guy

https://www.crimestopper.com/cstech/library/security/security_systems/remote_start/rs1-7_g5fm_ins_rev_07-2014.pdf

I've attached the installation instructions to this reply.
I appreciate your response. I'm not sure what the aux output is or where I can tie into? Lock signal meaning the door lock signal? I know when the car remotely starts it locks the doors for theft purposes. I don't know what the monetary defrost signal means either..Sorry, I thought I was pretty handy but I'm not sure what a diode is etc... little embarrassed...

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AWB

I suppose we can start from scratch. Where would I find a aux output? Not sure if there are two wires feeding the rear defrost switch. Again, here is a copy of my instructions/installation manual for the remote starter.

https://www.crimestopper.com/cstech/library/security/security_systems/remote_start/rs1-7_g5fm_ins_rev_07-2014.pdf

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AWB

ORANGE / white and orange can be programmed as Aux 2...

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Lectric Guy

My guess is you viewed the link I sent, thanks for doing that. As it stands now I'm not using the 3 wire harness that contains a blue/orange, ORANGE / white and green. The other larger 12-pin harness only has orange available to use. With saying that I would have to use the orange wire from the 12 pin plug and the ORANGE / white from the three pin plug not plugged into the module as of now? Just wanted to clarify, since I have these two available wires, how would I wire the rear defrost to work? I'm assuming having these two available wires eliminates the idea of having to use diodes? Thanks

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AWB

Sorry, I was a bit short on my explanation.   I am not certain about the defrost signal in the Buick...you're describing a momentary button press. I would check the output of the switch with a voltmeter and see if it supplies a momentary ground or 12V signal when pressed. If it is a momentary ground, I would use the Aux 2 wire to directly connect to the switch output; If it is a 12V signal, I would use Aux 2 lead to control a relay to supply 12V when the Aux is pressed.

Post back with what you find.


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Lectric Guy

Ok, I will check and get back to you.
Once everything is determined and wired properly, will a separate button need to be pressed on the clicker fob to make the rear defrost work? I believe the fob only has lock, unlock, trunk and remote start buttons. Will the remote start button activate the rear defrost on its own?
I appreciate your patience with me, My questions could be quite annoying at times.


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AWB

No problem, I am sort of short on time today, so I am trying to get back to you as completely as possible. I'm not a Crimestopper guy, but it looks like Aux2 is activated by pressing trunk and unlock at the same time. You would need to press these buttons on your remote at the same time after remote starting the car.

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Lectric Guy

wow, that sort of sucks! lol, wish there was a way to wire it so when I start the car it activates the rear defrost. Hopefully there is a way to wire it that way otherwise i might skip it all together.
Would there be a way to make the rear defrost work without having to hold two different buttons down?

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AWB

Sometimes there are limitations with the remote start, such as the available outputs. Anything is possible, just depends what compromises that you are willing to make.

You could hook up the lock signal as I described in my first reply. Then program the remote start for "Lock after start". This will lock the car and set the defrost to on after the car is started.

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Lectric Guy

ok, I'll get back to you with what I find.
Just to mention, after the remote starter starts the car, the doors lock as it is now. I'll follow up. thanks again.

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AWB

I'm trying to wire in a rear defrost switch to come on when remote starting the car. I really need someone kind enough to assist me with the step by step wiring configuration to make this happen. This is for a 1995 buick lesabre. From my research thus far I believe the pink wire is connected to the rear defrost. I need to check to see if that is the case. If so, splicing into that pink wire is the only thing I really know how to do. I installed the remote starter kit myself. I do have keyless entry with the remote starter. The excellent thing is after the vehicle remotely starts the remote starter locks the car for safety. I can maybe tie into the locking setup to trigger the rear defrost to come. I'm lost at this point. Thanks for reading.

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AWB

lectricguy,
So I checked the pink wire, this is the activation wire for rear defrost button. I got 12 volts at the wire while the car was running. Once pushing in the rear defrost button the volt meter read 0 volts for the pink activation wire. So with saying that, would I use the yellow/black wire from the remote starter 12 pin wire harness to splice into the pink rear defrost wire?
If not, do I need to factor in a relay? If so, my relay that I have has 5 pins. Do I use only 4 pins out of the 5? I think I'm getting closer to figuring this out but am far from finishing or understanding what to do next. Thanks again!


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AWB

So just to be clear, are you measuring from 12V to the defrost button lead, or from ground to the button lead?

Is the signal momentary or does it remain, or stay "latched" after pushing the defrost button?

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Lectric Guy

I'm sorry but I don't understand what you mean? I also don't know what you mean my latching?

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AWB

This is a pretty basic question, but to simplify, latched means it stays at a constant state (like your headlight output for example), versus a momentary pulse (like your power door lock switch).

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Lectric Guy

Ok I will follow up. Thanks

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AWB

So, I had my meter black grounded wire hooked up to ground, (vehicle ground) I than used my red positive probe and spiked the "white" wire from the heat control... it was not the "pink" wire I thought it initially was. So I had the black wire from my meter to vehicle ground and red wire from meter piercing(spiking) white wire. I had 12 volts on the white wire while the vehicle is running and rear defrost switch off, once I pushed in the rear defrost switch to turn it on(the little red light came on the switch to confirm the switch is on), the voltage went down to 0. Does that make sense?

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AWB

It makes sense, the switch is providing a ground when the defroster is on. My guess is that the 0 volt reading remains after you release the switch (latched) not just during the time the switch is actually being pressed (pulsed).

If this is the case, you can use the ORANGE / white wire in the default (ACC) position to turn on defrost during remote start.

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Lectric Guy

So I already hooked up the yellow black wire to the white "trigger" wire for the rear defrost switch... hopefully that didn't do any damage to the starter brain. If I use the orange white wire from the 12 pin wire harness will the remote starter automatically turn on the rear defrost or will I have to push a button on the fob to activate it after the car starts?
As it stands now with the yellow black wire hooked up to the rear defrost wire, when remotely starting the car the rear defrost button light does NIT come on. So with saying that I will check to see if there is power to the grid at the rear window as I may have it working as it stands. Thank you and let me know what I think I'm my questions when u have a chance,

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AWB

Update!!
I was able to remote start the vehicle, probe the rear defrost grid wiring. GOOD NEWS! I found 12 volts going across the grid! So it looks like I have voltage going across the grid which means I'm all set!! Thank you very much for all your help!! It's great to know their are people out there willing to offer their time to help others!
Anthony

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AWB

Glad to hear everything is working.

If you used the ORANGE / white wire I suggested, you would get the same result, but the defrost would have been off during the starter crank, and come on automatically after cranking.

The only additional comment I would make is that you may wish to add a switch inline from the remote start signal to the defrost trigger, so that you can disable the defrost during warmer months.

Cheers!


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Lectric Guy

That's a good idea! Again, appreciate all your help. If you ever need contractors/handyman services send me a private message, I'll be happy to send you advice if need be. Thanks!
Anthony

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AWB