(WIRING) How To: Factory 1987 T2 ECU into 1st Gen
 

to make this work you need t2 main relay,right side harness from the engine to the ECU, left side harness should be made form scratch since you only need between 10 and 15 wires to make it work, here are some pic on how to power it up
http://i95.photobucket.com/albums/l1...uiparts197.jpg the next pic is the plugs to the ecu and in the plugs it said what color it is
http://i95.photobucket.com/albums/l1...uiparts198.jpg and more pic of the plug
http://i95.photobucket.com/albums/l1...uiparts195.jpg
http://i95.photobucket.com/albums/l1...uiparts196.jpg
on the last page you can see the 3 plug from the ecu
http://i95.photobucket.com/albums/l1...hiquiparts.jpg