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Chavez91
April 17th, 2016, 07:15 AM
Do you Ross or anyone happen to have the Bench Harness pinouts for the T-87

The only document I could find shows

Pins 37/53 - GMLAN +

Pins 38/54 - GMLAN -

Pin 35 - Key ON power

Pin 65 - Ground

Pin 66 - Battery +

Am I missing any or are any of the pins wrong?

GMPX
April 17th, 2016, 08:49 AM
Do you Ross or anyone happen to have the Bench Harness pinouts for the T-87

The only document I could find shows

Pins 38 - GMLAN -

Pins 37 - GMLAN +

Pin 35 - Key ON power

Pin 65 - Ground

Pin 66 - Battery +

Am I missing any or are any of the pins wrong?

Powers are ok, CAN PIN's as corrected in red above, but it needs a CAN terminator or ECM on the bus at the same time.

Taz
April 17th, 2016, 09:08 AM
You will likely also need 12V ignition power (key ON power) to pin 51.

EDIT: Sorry - that is for an 8L90 (T87) - not sure if the Allison is the same

GMPX
April 17th, 2016, 09:37 AM
You don't need 51, that pin out above worked for me. The T87 hardware is the same between the 8 speed and the Allison, the software is different.

Chavez91
April 17th, 2016, 07:03 PM
Using 35, 37, 38, 65, 66 and then terminating across 53 & 54 (i used an LLY ECM as I was too lazy to dig for a resistor) has gotten the job done perfectly.

Thanks!

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