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View Full Version : LT-1 computer wiring harness. Pin to plug


dumbpunkkid
03-22-2003, 04:02 PM
ok these are all done by harness color and pin #

Blue Connector

1 Tan w/white= ECM ground !!! very important

2 Lt Blue w/white = tranny connector

3 pink = need to double check

6 Dk Brown = tranny conn

9 Brown w/white = Check engine light = EGR need to double check

10 Dk Green w/white = Canister purge

11 Tan w/Brown = tranny connector

20 White w/black = Underdash connector # 6

22 Dk Blue = knock sensor

28 Yellow w/white = tranny connector

30 Tan= Underdash connector #9



Black connector

2 Red w/black = Dist diag (grey)

3 Pink w/black = Dist diag (grey)

5 White = Ign Module

6 Black = Tranny connector = TDS = ECT

7 Lt green = tranny connector

8 Green w/white= VSS output

12 Yellow w/black = Tranny connector

13 White = Tranny connector

14 Red = Dist diag (grey)

15 Orange = Underdash connector # 16

16 Black = MAP = IAT

19 Yellow = MAF

20 Lt Blue w/black = Dist diag

28 Grey = TPS

29 Grey = MAP

30 Pink = MAF

31Orange Underdash connector #16



Red Connector

2 ECM Ground IMPORTANT!

3 Black = inj # 1

4 Lt Blue w/black = inj #4

5 Yellow w/black = Inj #6

6 Red w/black = inj #7

7 Green w/white = Fuel pump turn on

9 Grey = EGR

10 Blue = coolant fan relay turn on #2

11 Dk Green = coolant fan relay turn on #1

14 Brown = Air pump turn on relay

18 Tan/white = ECM GROUND IMPORTANT

19 Lt Green w/black = Inj #2

20 Black w/white = Inj #5

21 Pink w/black = Inj #3

22 Blue w/white = Inj #8

25 Lt Green = to vats

31 Purple = VSS

32 Yellow = VSS



Clear Connector

1 Lt Blue w/white = IAC

2 Lt Blue w/white = IAC

5 Lt Green w/black = IAC

6 Lt Green w/white = IAC

7 Tan = pass side O2

8 Purple = Pass side O2

14 Lt Blue w/black = brake switch

15 Orange w/black = gear shift indicator

16 Red w/black = Tranny connector

19 Tan w/white = Drivers side O2

20 Purple w/white - drivers side O2

21 Tan = IAT

22 Blue = TPS

23 Lt Green = MAP

25 Yellow = ECT

28 Pink w/black = Tranny connector

29 Blue = Tranny connector

30 Red = Tranny connector

32 Black = Tranny connector



All these were done with an ohm meter and the Painless harness. If you have a stock harness and dont know whats what this may help you.