Apologies if this has been covered, but I searched and couldnt find a definitive reference on this. This thread was the most useful:
https://www.thirdgen.org/forums/elec...ml#post5936699

Trying to do some of the smaller stuff on my swap and tackling cruise now. I think I have this 75% right -- based on Pocket's post in the above thread and this article:
http://www.lsenginediy.com/gm-gen-ii...uipment-guide/

Wire (bypassing the existing cruise module):
C209 -> TAC
On/off: Gray -> Gray (14)
Set/coast: Dark Blue -> Dark Blue (4)
Resume/accel: Gray/black -> Gray/black (5)

I dont know where to wire the brake input (red-ish) from the C209 to the TAC though. As always, help is greatly appreciated.

Thanks
Chuck

 

There are three methods for cruise. Use the factory cruise unit (vacuum) or a junkyard GM digital (non-vacuum) unit. Or an aftermarket unit (non-vacuum). I'm assuming you will (try) use the factory unit.


Iirc something in the cruise (CTSV) was looking for a uart signal.

May help
http://ls1tech.com/forums/conversion...e-control.html

check this out
http://www.brandondist.com/cruise-controls.html

 

Get the cruise control schematic for the 1991 Camaro RS you own and the same for the vehicle the engine came from , you will wire directly from the switch on the column to the TAC unit the wires in each schematic should be labeled about the same. I am away form the house right now when I get home I will look at my notes and give you better info on the brake wire. I did this on my 92 Convert with a LQ4 from a 2003 2500HD truck and it works great, much easier than I thought it would be. This may help too http://www.lt1swap.com/dbw.htm

 

90-92 3rd gen cruise
http://www.austinthirdgen.org/mkport...se_control.jpg

And stop light for the second brake wire. Cant remember is DBW systems need both, anyways here it is
http://www.austinthirdgen.org/mkport...ithout_T61.jpg

The C209 Red wire is the 2000ppm signal from the old ECM or buffer box. Not used in DBW or DBC cruise conversions