[David and Teresa]

Hello all,

I've been working on this problem for a couple month's. Basically, the Allison Shift Pad doesn't light. The coach cranks anyway, but will not go in gear. It will actually crank without the shift pad connected.

I've had Allison mobile repair out 3 times. The first time, after checking wiring from the computer to the shift pad, voltages, etc., they said it was faulty shift pad. I ordered a rebuilt replacement. No lights.

The second time, more continuity checks and they programmed a brand new, in the box computer, and brought it. We swapped out the computer, no lights. I called the Allison Tech line and talked to Mike, a WTEC II guru, in fact, the only one there. He gave me a couple of things to try and then call him back.

On the third visit, Mike suggested we power the shifter directly from the battery. We ran lines from back to front, powering the shift pad directly. No lights. Also, we made a 12vlLight with a couple leads to make sure it burned bright when checking power wires. All the wiring at the front of the coach appears fine. 

I called Mike back at Allison to report the findings, and Mike retired last week. Mike was the only WTEC II tech there since they don't support II any more.

So, the only thing I haven't done is check the continuity from the transmission to the computer, which I was hoping I wouldn't have to do. Any ideas? Is it possible that I have 2 faulty shift pads?

Thanks in advance for any insight.

David