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Old 07-21-2014, 03:18 AM   #43
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The selectors don't actually have switches in them.
The button you press on has a small round carbon rich pad on the under side of it. This carbon pad presses down onto copper tracks on the circuit board creating a circuit. The electronics on the board convert the button presses to signals to be sent to the ECU.
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Old 07-21-2014, 07:36 AM   #44
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Accurate Descriptions of the Allison Keypad

Thanks Elictrix and Terry735001 and VanDiemen23 for your insights and suggestions.

My engineer son and I didn't want to attempt removing the clear coat on the back side of the circuit board, fearing that damage could result. As such, we couldn't sniff the contacts for a signal.

Thus, I have abandoned the effort (for now).

New subject:

Backlighting on the Allison Keypad

My keypad isn't getting the "lights on" signal from the dash circuitry (tested and confirmed with two keypads). Does anyone have an Allison keypad pin-out wiring diagram?

Thanks again!
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Old 07-21-2014, 08:10 AM   #45
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Do not give up on the relocation dream. Keep a notepad by the bed and one night you will have the ah ha moment.

Keep the dream alive!
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Old 07-23-2014, 03:55 AM   #46
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WTECIII selector

For 12-volt lights are on wire 187.
Ground both 186 and 188.
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Old 07-23-2014, 03:28 PM   #47
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Quote:
Originally Posted by Elictrix View Post
For 12-volt lights are on wire 187.
Ground both 186 and 188.

Wow - just what the doctor ordered. Thanks!
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Old 07-23-2014, 05:06 PM   #48
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Let there be (back)light!

Elictrix:

I confirmed the circuit/pinout combo by backlighting my test keypad, and I identified a 12v + GRND/GRND dimming light circuit I can tap into on an adjacent accessory switch.

It may not be ergonomic, but at least I can see it in when driving the dark!

Thanks again for the help.

Tom Ryan
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Old 08-03-2014, 12:01 PM   #49
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Quote:
Originally Posted by thomaspryan View Post
Found one for $90 - figured that's worth the experimental risk. When I get it, I'll dive in to see how 'hackable' it may or may not be. I'll also keep everybody posted.

ACcfccuCtt
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Old 08-03-2014, 12:16 PM   #50
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Cy TSID ća
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Old 08-03-2014, 01:03 PM   #51
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ACcfccuCtt
Cy TSID ća

What are these or what do they mean?
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Old 08-03-2014, 01:59 PM   #52
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No idea. Maybe I butt-posted?
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Old 08-03-2014, 02:17 PM   #53
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I've heard of pocket dialing, butt-posting noÖ
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Old 08-03-2014, 03:08 PM   #54
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Quote:
Originally Posted by thomaspryan View Post
No idea. Maybe I butt-posted?
That's good news. I was beginning to wonder if you were having a stroke and suffering from aphasia!
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Old 08-03-2014, 08:52 PM   #55
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Quote:
Originally Posted by Elictrix View Post
The selectors don't actually have switches in them.
Those ARE switches - just a different kind. You can even buy them from Digi-key.

You can also read voltage thru the conformal coat by using sharp probes (that's why they're so sharp!)
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