One thing I hate is a forum topic without a solution. So, I'll give you mine, in the hope that this could help someone else in the future.

I swapped my 1996 VDO cluster w/o TRACS and my 1996 EFI ECU into my 1997 850 w/ TRACS, and bingo...speedo issue resolved. No lights on the dash either; even ...

I recently purchased a 1997 Volvo 850 N/A, with TRACS and a Yazaki cluster. I have been having trouble with the speedometer reading 0 once I hit approx. 50 mph. I purchased and installed a re-manufactured ABS module from Midwest ABS, thinking this would be the fix. However, the problem persist. I ...