PS-32 Tach Reader Not Functioning-Update

No need for all that connector swapping at the board. MTH parts sells upper PS32 boards with the 5V connectors and at dealer/ASC pricing, quite reasonable.

Part 2, a known issue on the stacker boards was that the upper board sockets might not have the leads clipped and could poke down and short to the capacitors. If you performed this big connector swap and/or your board from the factory was not corrected- that could damage the lower board.

See @gunrunnerjohn's post https://ogrforum.com/...-but-there-s-a-catch

Last, maybe one of the other big name techs will chime in, I'm just concerned there are a lot of variables here and I have not seen this tach problem yet on a PS32 board install. I know what and how to fix a PS2 3V with tach issues, but PS3 is a different animal.

There's no "known" specific issue with the PS32 boards and the tach input.  I've installed a ton of them in both upgrades and replacements, and I've yet to have a tach input issue.  I've had a couple of tach reader issues with replacements.

I'd ring out the three leads from the tach board all the way back to the PS32 board.  If they're all intact, maybe it's time to consider the top stacker board.

There's always a first time for everything, so I'd probably consider obtaining the PS32 top board with the 5V connectors as Vernon suggests, that will verify the function.

Thanks guys! I have done many updates but this is a first for me as well. I assumed the top boards were not available due to the chip shortage but a few are now on order.

The upper board leads were a bit long so they have been clipped. They did not appear to be touching a cap,  but it definitely would have been possible if pushed down.  I do have an extra PS32 upgrade kit and could use its lower board to the top board I currently have.  Any thoughts?

Be SURE the wiring and tach spacing is all correct before proceeding with board swapping.  FWIW, I've had a number of bad tach readers, but since you've swapped it several times, that's not likely to be the issue.

The long leads bit me once, fortunately it didn't cook the board, just made things go nuts.  My whole shipment of the PS32 boards had the untrimmed leads that time, I guess the lead trimmer was on vacation.

Update: The new board arrived and the tach reader now functions. Thank you Vernon & GRJ!

I'm not sure how I damaged the original board - perhaps it was the untrimmed leads? The center leads on the replacement board were trimmed flush as shown in the part images in the previous posts.  Is the damaged board easily repaired or does the cost outweigh the benefit?

A new question involves the number board lights being assigned as ditch lights in the sound file. I have tried a few PS3 sound files for GP9s, should I go back to a PS2 sound file?