How To Unlock Volvo Truck Radio. The radio on the back of it has a number. If you leave the car off for two hours the lock will reset and you can start over.
At the bottom of your vehicle’s windscreen, on the driver’s facet, So i walked back to the service area and asked the tech what made the check engine light come on and he told me the radio had malfunction and tripped the light.a check engine light yep it seems that on a lot of trucks and cars the diagnostic goes through the radio so be careful if you change the stereo make sure the place under stands this ahead of time.but there's a code you. Volvo truck radio serial number;