trans harness pinouts?
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11 Second Truck Club
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trans harness pinouts? Does anybody have a chart showing wire colors and pin locations for the tranny harness on a 4l60e and 4l80e? Specifically I am concerned with the big round connector on the passenger side. I am converting a harness from a truck with a 4l80e to work on a 4l60e and I don't want to have to buy the $120 shop manuals if I don't have to.
Re: trans harness pinouts? 
This is viewed looking down into the case connector from above BTW...
A - Shift solenoid A
B - Shift solenoid B
C - EPC High
D - EPC Low
E - +12VDC input
L - Trans temp sensor signal
M - Trans temp sensor ground
N - PSM range A
P - PSM range C
R - PSM range B
S - 3-2 downshift solenoid
T - TCC solenoid
I don't have info on the 4L80e unfortunately..
Thread Starter
11 Second Truck Club
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Joined: Jan 2002
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From: Missouri
Re: trans harness pinouts? Thanks-that is what I was looking for. I could still use it for the '80 if anybody has it. I have the PCM pinouts for the 4l60e so maybe I can trace wires between the PCM and the connector and make some kind of sense out of it!
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From: B'Ham Al
Re: trans harness pinouts? since a 4l80E does not have a 3-2 down shift solenoid,the only difference in the pinouts involves terminals S & T.
S-TCC control on the 4L80E/3-2 solenoid for 4L60E
T-not used on the 4L80E/TCC control for 4L60E
and here is the shift solenoid state chart
....4L60E......................4L80E
Gear....SS1....SS2.....Gear...SS1...SS2
1.......on.....on........1.....on...off
2.......off....on........2....off...off
3.......off...off........3....off....on
4....... on...off........4....on.....on
Wire colors(4L80E)..harness side.....int. harness
A-...............LT GRN...............LT GRN
B-..............YEL/BLK...............YEL
C-..............RED/BLK...............PPL
D-.............LT BLU/WHT.............LT BLU
E-................PNK..................RED
L-...............YEL/BLK...............BRN
M-................GRY..................GRY
N-................PNK..................PNK
P-................RED..................ORN
R-...............DK/BLU...............DK/BLU
S-................BRN...................BLK
....................4L60E.................
S-.................WHT..................WHT
T-................TAN/BLK...............TAN
Maybe some of this will help,better late than never.
Tony
S-TCC control on the 4L80E/3-2 solenoid for 4L60E
T-not used on the 4L80E/TCC control for 4L60E
and here is the shift solenoid state chart
....4L60E......................4L80E
Gear....SS1....SS2.....Gear...SS1...SS2
1.......on.....on........1.....on...off
2.......off....on........2....off...off
3.......off...off........3....off....on
4....... on...off........4....on.....on
Wire colors(4L80E)..harness side.....int. harness
A-...............LT GRN...............LT GRN
B-..............YEL/BLK...............YEL
C-..............RED/BLK...............PPL
D-.............LT BLU/WHT.............LT BLU
E-................PNK..................RED
L-...............YEL/BLK...............BRN
M-................GRY..................GRY
N-................PNK..................PNK
P-................RED..................ORN
R-...............DK/BLU...............DK/BLU
S-................BRN...................BLK
....................4L60E.................
S-.................WHT..................WHT
T-................TAN/BLK...............TAN
Maybe some of this will help,better late than never.
Tony
