How to Reset Service Light in Volvo 850



Remove the top to diagnostic connector "A".
With the top off remove the jumper and insert it into the socket labeled Number 7.
With the jumper in place you will begin to communicate with the instrument cluster. Depress the round button 4 times (about second on the depression time).
The red light to the left will blink once, now depress the button once, the light will blink once, depress the button 5 times, the light will blink once, depress the button once, the light will flicker.
The flickering is hard to see some times, but you are now finished, remove the jumper put the lid back on.
The information in this tutorial is valid in the following Volvo 850 years / versions:

- Volvo 850 2.0 20v - Petrol - 1991, 1992, 1993, 1994, 1995, 1996, 1997
- Volvo 850 2.0 HPT - Petrol - 1995, 1996, 1997
- Volvo 850 2.0 LPT - Petrol - 1996, 1997
- Volvo 850 2.0i 10v - Petrol - 1994, 1995, 1996, 1997
- Volvo 850 2.5 20v - Petrol - 1991, 1992, 1993, 1994, 1995, 1996, 1997
- Volvo 850 2.5 T - Petrol - 1996, 1997
- Volvo 850 2.5i 10v - Petrol - 1992, 1993, 1994
- Volvo 850 2.5i 10v - Petrol - 1994, 1995, 1996, 1997
- Volvo 850 R - Petrol - 1996, 1997
- Volvo 850 T-5 - Petrol - 1993, 1994, 1995, 1996, 1997
- Volvo 850 T-5 R - Petrol - 1994, 1995
- Volvo 850 TDI - Diesel - 1996, 1997