hi can the service light on the dash be reset after a service has been done by a non volvo engineer on a 1998 volvos 70?

 

I'm interested myself. I've seen some instructions from the web

-Put the key into the ignition and turn it to position "I."
-Press the trip odometer button in and hold it. Turn the ignition key to position "II."
-Wait about 5 seconds until the service engine light begins to blink. After the 4th blink, turn the ignition key back to position "I."
-Release the button and start the engine. The light should have turned off. If not, repeat steps 1 through 4 again.

I've tried this multiple times but the light does not reset. It just comes on when the engine starts and goes off after like 2-3 minutes.

 

Yes, if they (or you) have a special tool.

 

That procedure is for 99 and later. rspi is right, you need the special tool.

 

Turns out you can reset the service light with the trip reset. I changed the oil and followed the procedure; Servicde light is off.

-Hold in the reset button
-Turn the ignition to the RUN position
-When it starts blinking, release the trip button after the 3rd, but before the 4th blink
-Ignition off

Start the engine, Service Light" will be off.