I have the same car and had the same issue. the SOND light is your oxygen sensor.
The 1983 through to 1985 have a low fuel warning light and no reserve switch. The warning light is hooked to a sensor which is in the secondary fuel tank under the seat.
The Right Stuff won the Oscar for Sound in 1983.
From Spokane Volvo Jag and Land Rover......the initial timing is 10 to 12 degrees!
Winter Light - 1983 was released on: USA: 1983
My Chilton Volvo repair manual ( 1970 to 1983 ) shows ( DOT 4 brake fluid )
The Right Stuff won the Oscar for Sound Editing in 1983.
Sound Elixir was created in 1983.
The Sound of Goodbye was created in 1983-10.
There is no choke light in a 1983 chevy, no matter what model you have.
Big Sound Authority was created in 1983.
Chi Sound Records ended in 1983.
According to my Chilton's Volvo repair book : The ( 1980 to 1983 ) DL , GL , Diesel takes : With engine oil filter change : ( 7.4 U.S. quarts ) * my book only covers up to the 1983 models *