In an automatic there is a transmission shift relay that is behind your upper dash vents and can be seen just right of the glove box once you have it removed.
It should be white in color with, IIRC, 6 prongs.
More than likely that would be your culprit. I just went through this on my 87.
VERY CAREFULLY.
no i have a Volvo 1991 se turbo.
how do you reset engine light on 1991 volvo 240
replace ign sw on 1991 volvo 240
long answer: yes
Look in the Volvo car brochure.
My 1991 740 volvo turbo doesnt start specially during the morning.Is it comes with a cold start valve?
Polar Shift - album - was created in 1991.
by Mitsubishi, Japan
You can locate the radio code, for your 1991 Volvo, by consulting your owners manual. The owners manual should have all of the vehicle codes.
DoT 4
go to www.the12volt.com