1997 Volvo 850 odometer and trip mileage stop working

https://big-manuals.com/products/1997-volvo-850-service-repair-manual

All kinds of workshop and services manuals are available here. May be this could help for you

If the odometer stopped but it shows speed it is not the cable. There is a small plastic gear in the speedometer which will strip if you reset the trip odometer while the car is moving. Any speedo shop can repair it

How many miles are on this vehicle? I ask because the odometers in these car stop working around the 140k to 170k mark. Did the button comeback? Is this the mileage on the digital or analog trip meter?
The process to change the odometer gear is fairly straight forward and takes less than $20 and an hour. Let me know.

the speedometer on this car is worked via an electric signal
from the abs system,if the odometer trip has failed it will
require a new speedo head as the odometer is integral
part of the speedo.should be able to pick up a second hand
unit relativly cheaply.
cheers Brian

If you want to solve your problem, click on the link I attached
https://www.reliable-store.com/products/volvo-850-service-repair-manual-1992-1996-download

Possibly a little gear inside the odometer has broken down. You find theese gears easily on E-Bay. http://shop.ebay.com/?_from=R40&_trksid=m38.l1313&_nkw=volvo+850+odometer&_sacat=See-All-Categories

Hello, We had the same problem about a year ago: 1996 Volvo 850 20V 2.5 L. We turned the ignition switch several times, and all the gauges was came back. I think the ignition switch cause the problem. We haven't had this problem since than.

where do the vaccum lines from the air cleaner in my 96 850 glt go?

This has been a problem with VOLVO especially the 850 models what happens is the plastic senssor inside the speedometer breaks off and it will tell you the road speed but ODOMETER AND TRIP METER will not work and the only way to fix it is to take the cluster out and sometimes it can be soldered back in place or get a used cluster and replace the unit sorry but it is not a simple fix

This is a common problem with all models of volvo, with the non digital odometer  pre 1998,, there is a tiny nylon gear deep inside the odometer that needs to be replaced. Your dealer will not fix it, but will put in a new one for you as the cost of fixing in labour is more than a new one,, My solution is much cheeper,, I have
many low milage VOLVO odometer/instr clusters, a few hi'r km 1s


ODOMETERS FROM 1987-PRESENT
I have many pre 1998 Volvo instrument clusters, most with Very low milage, almost all in Km, I have most models of Volvo.

at these prices IT'S A GOOD IDEA TO HAVE AN EXTRA ONE , comes with detailed instructions -with pictures-on how to remove your old one and re-install

just for example
I have 4,, 1994-1997 850/s70/v70 /c70turbo with less than 10,000 km
2 1994-1997 850/s70/v70/c70 non turbo with less than 10,000 km
1 1990 740 -940 turbo with less than 4.000 kms

I also have many Volvo instrument clusters from 1987 to PRESENT with varied milage,,let me know what year and model and milage you are looking for,, I will have something close

WILL SHIP ANYWHERE IN N.AMERICA