Ok...so I just got my Lingenfelter launch control today and I want to install it tomorrow. I was thinking about hooking up the activation wire to the preset button on my steering wheel controls. Is this possible? Is that a + or - when you press the preset button? Which wire on the radio harness is the preset button? All input would be a great help....

-Dave

 

No, it won't work. All of the steering wheel controls run through a single wire. Each switch has a different resistor and the radio determines which switch is pressed by measuring the amount of resistance introduced (actually voltage drop caused by the resistor).

 

Thanks for the input...it sounded like a good idea at the time....


-Dave

 

This will work I just got done doing it to my car. It takes some time but most of that was spent figuring out how everything works and working around it. If I ever get time I am going to post the info in the LT1 and likely stereo electronics sections. Mine works perfect and I also set it up to use Left control for line lock and right control for what ever else you want (nitrous trans brake what ever you could possible use it for).

This will make the controls inactive for the radio but since I have an after market head unit the controls never worked since I got the car. There may be a way to make this work along with the radio with the correct relay but I wasnt worried about it.

 

Just how did you make this work? Did you add some sort of logic circuit?

You can use the single output wire as a pulse to control a latching relay but pressing any of the steering wheel control buttons will then trigger the same pulse - you end up with six buttons that all do the same thing. There is no way to distinguish between different buttons without a circuit to measure the different resistances. There is also no way to use different buttons for different functions without that logic circuit.

 

I ended up with two groups of buttons that all 3 on the left side control work the same but the right hand 3 work for something different. In short I did away with the lights in the steering wheel controls and rewired it so the one board uses those 2 wires to make the second circuit.

You could with a couple relays make this only work so that it will work the radio or the line lock one or the other but you may only have one or two buttons that would work the line lock when that circuit is active.

Have a relay that is wired off the master toggle or rocker that turns on the line lock power circuit not the line lock activation just power to the button like in a SJM kit there is a master toggle to power up the line lock circuit. Catch the blue wire coming from the controls to the radio and tie it into the relay. Set it so that its on the normally closed side so that if the power from the line lock toggle is not there to close the relay circuit it goes to the radio. Now when you turn on the line lock circuit the relay coil pulls and disconnects it from the radio and to another wire. Have this wire go to a small voltage coil relay that takes less then 12 volts to move the coil. A PC relay that works off of like 6 or 9 volts. Any button in the steering wheel controls that doesnt have a ton of resistance before it outputs back to the radio would activate this coil. When this coil is energized have the power coming from the toggle for the line lock activation attached so its powered up when this relay is moved. This second relay would act like the monumentary push button used to activate the line locks magnetic coil.

This would only work the line lock if the master power for it is on and only work the radio if the master switch is off. I am not sure which of the buttons this would work on since I do not feel like doing math tonight to figure out which buttons have what voltage output but the volume up and down should have the least amount of resistance and thus the highest voltage output.

Sorry for this being so long winded but I wanted to get across what I was thinking. Hopefully its not so long winded that I lost everyone.