DBW cruise control lever
http://www.dakotadigital.com/index.c...prod/prd50.htm
I just spent an hour figuring out that this lever has a normally closed "set" while all the schematics from GM show it normally open...Doh!
Anyone know of a simple GM lever, without wiper controls, like the one in the link?
Gary
Turns out "set" also closes the accel/resume circuit. So if I wire the accel/resume wire to the set terminal on the ecu, the set will work normally but the accel/resume will work the same as set.
I can live with that.
Besides, I could not find a cruise only switch anywhere with the single screw mount base.
I'm actually ok with just a fucntional on/off, and set. I rarely use the resume/accel. So I think I'm going to just wire it with the accel/resume wire going to the set, and the set wire disconnected.
I considered the relay too, but thinking it's not worth the effort considering how little I use accel.
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You need to put +12v to the cruise on signal wire (gray IIRC)
You need to use the set/coast switch wire. (Dark blue IIRC). Putting voltage to that wire will lock in the speed you are at, if you keep voltage on it the vehicle will coast down to whatever speed you release the voltage from it.
The resume/accel button/wire will only work after theres +12v on the cruise signal wire AND there is a +12v pulse to the set/coast wire.
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They make the dash mounted box that normally open.
Off: No continuity
On: Continuity on Red (+ input), Brown (Not sure what this goes to...DD uses it for "positive brake" on their cruise setup) and finally Green (Set/Coast)
Accel: Continuity on all four wires
Set/Coast: Continuity on Red (+ input), Brown (Not sure what this goes to...DD uses it for "positive brake" on their cruise setup) and finally Yellow (Resume/Accel)
It seems to me that this switch would work as is but I still do not know what the brake switch wire goes to. I believe it is to go to the switch and provides the power in the normally closed part of brake switch which tells the computer to continue "cruising" But then when the brakes are applied, it brakes the signal telling the computer to cancel the cruise. So, the part I am not seeing is when you let off the brakes...what keeps the computer from "cruising" at your then current speed since there is power on the "set/Accel terminal? Does that make sense?
I hope someone can clarify this for me.
My plan is to use that funtion as set and leave off the accel fuction.
If that's true...I don't see how the wiring schematic (from other post RE; DBW cruise) will work. For example: he has the green wire (which is hot when switch is on) powering the one relay that is NO. This means that IF yellow was hot...it would send the 12V to computer. But since the the yellow isn't hot, nothing happens on that function. OK...that I understand. Now...when you push the set button to send the 12V on the yellow wire...you lose the power on the green thereby opening the relay and power on the yellow wire can no longer reach the computer to give the 12V signal. It seems if the brown replaced the green for that relay, it would work. Can someone point out where I am wrong?
Last edited by ls1nova71; Feb 9, 2011 at 10:26 AM.







