That will be a series of relays, not a fuse.
No way to answer without knowing the model, axle weight ratings, and wheelbase.
There should be a sticker near the belt which has a routing diagram on it. Barring that, we'd need to know if the truck has the Cummins ISX, Volvo VE D12, or Volvo VE D16 engine in order to provide you this information.
You need the Volvo software to do this. It's programmed into the engine ECM.
Number one eve valve
Caterpillar C series, Cummins IS series, or Volvo VED series.
52,000 lbs., assuming you have 40k rears and a 20k steer. What you'd be allowed to gross legally if you converted it to a straight truck will depend on wheelbase.
On our 2005 Volvo 670, there is a little pull ring on the floor in front of the feet area, up under the dash area. Hope this helps. I have a 2007 Volvo......how do you open the hood Semi Truck
The 2005 Volvo S80 has 20 valves.
The 2005 Volvo XC70 has 20 valves.
The 2005 Volvo XC90 has 20 valves.
Curb weight for a 780 is typically between 18,000 - 19,000 lbs.