4L80E harness with 4L60E trans?
#1
4L80E harness with 4L60E trans?
My swap is an '01 6.0 from a 2500 HD 4x4, with a 4l60E from an '05 van, into a '48 Diamond T pickup. I'm using the donor truck harness as a stand alone, with help from this board, the LT1swap site, and a buddy here who provided the GM factory schematics (I actually have TOO much information!). I have the ECM from the donor truck, and most of the harness.
What I don't have is info about the pin out for the trans plug. I have searched here and found pin outs and the pins to swap for the 4L60 to 4L80, but I'm going the other way. The trans plug physically plugs into the trans, but I know the 4L60 uses one speed sensor, and there is a white wire in it's pin connector the 4l80 does not use (according to the 4l60 to 4l80 swap pin connector I printed). I want to have the wiring completed before the engine/trans are installed, as it's much easier to access everything while the engine/trans are on the shop floor than in the truck.
I know it sound simple, but I want to make sure I have this figured out properly. Any help?
Brian
What I don't have is info about the pin out for the trans plug. I have searched here and found pin outs and the pins to swap for the 4L60 to 4L80, but I'm going the other way. The trans plug physically plugs into the trans, but I know the 4L60 uses one speed sensor, and there is a white wire in it's pin connector the 4l80 does not use (according to the 4l60 to 4l80 swap pin connector I printed). I want to have the wiring completed before the engine/trans are installed, as it's much easier to access everything while the engine/trans are on the shop floor than in the truck.
I know it sound simple, but I want to make sure I have this figured out properly. Any help?
Brian
#2
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My swap is an '01 6.0 from a 2500 HD 4x4, with a 4l60E from an '05 van, into a '48 Diamond T pickup. I'm using the donor truck harness as a stand alone, with help from this board, the LT1swap site, and a buddy here who provided the GM factory schematics (I actually have TOO much information!). I have the ECM from the donor truck, and most of the harness.
What I don't have is info about the pin out for the trans plug. I have searched here and found pin outs and the pins to swap for the 4L60 to 4L80, but I'm going the other way. The trans plug physically plugs into the trans, but I know the 4L60 uses one speed sensor, and there is a white wire in it's pin connector the 4l80 does not use (according to the 4l60 to 4l80 swap pin connector I printed). I want to have the wiring completed before the engine/trans are installed, as it's much easier to access everything while the engine/trans are on the shop floor than in the truck.
I know it sound simple, but I want to make sure I have this figured out properly. Any help?
Brian
What I don't have is info about the pin out for the trans plug. I have searched here and found pin outs and the pins to swap for the 4L60 to 4L80, but I'm going the other way. The trans plug physically plugs into the trans, but I know the 4L60 uses one speed sensor, and there is a white wire in it's pin connector the 4l80 does not use (according to the 4l60 to 4l80 swap pin connector I printed). I want to have the wiring completed before the engine/trans are installed, as it's much easier to access everything while the engine/trans are on the shop floor than in the truck.
I know it sound simple, but I want to make sure I have this figured out properly. Any help?
Brian
#3
I guess I'm sure I can, but my question is, "how?". There's a white wire, which my 4L80 plug/harness does NOT have, in the "S" position in a 4L60 plug, which goes where? To what pin in the ECM does this go, and can I simply add it? Or is there a wire in the 4L80 plug I simply need to move, as in going from 4L60 to 4L80, which a brown wire I understand gets swapped into the position the missing white wire goes, that I can switch?
Brian
Brian
#4
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I guess I'm sure I can, but my question is, "how?". There's a white wire, which my 4L80 plug/harness does NOT have, in the "S" position in a 4L60 plug, which goes where? To what pin in the ECM does this go, and can I simply add it? Or is there a wire in the 4L80 plug I simply need to move, as in going from 4L60 to 4L80, which a brown wire I understand gets swapped into the position the missing white wire goes, that I can switch?
Brian
Brian
Add wires: Pin C1 (blue connector) 78 to Pin "S" on trans connector.
Pin C2 (red connector) 42 to pin "T" on trans connector.
You will need to have the PCM reprogrammed for 4L80.
#5
You mean have the PCM reprogrammed for 4L60, since it's orginally programmed to operate the 4wd 4L80? I'm not meaning to sound dense, but I'm going FROM a 4L80 to a 4L60. ( I have the pin out to go from 4l60 to 4l80, which is not what I'm doing ) The VSS connecter, I'm assuming it was the rear one, in the harness (4l80) plugs into the 4L60 VSS sensor at the tailshaft, leaving the forward one unconnected?
#6
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You mean have the PCM reprogrammed for 4L60, since it's orginally programmed to operate the 4wd 4L80? I'm not meaning to sound dense, but I'm going FROM a 4L80 to a 4L60. ( I have the pin out to go from 4l60 to 4l80, which is not what I'm doing ) The VSS connecter, I'm assuming it was the rear one, in the harness (4l80) plugs into the 4L60 VSS sensor at the tailshaft, leaving the forward one unconnected?
The pinouts above I gave are correct when going to a 60E from an 80E (if I said otherwise, that was a typo).
Pins C2 (red) 20 and 21 are for the Speedo (VSS). The wires in 22 and 23 are for the 80E ISS. You might be able to re-use these, and use those wires for the 2 wires you need to add above (I am unsure if the pins are the same between the ISS and trans connectors).
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#9
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Pin S on the trans connector goes to C1(blue connector) Pin 79 not 78 as stated above.