Volvo Electrical

[Billdozer2]

I had a starting problem with my truck for a while. Mine would start really slowly. I always thought it was the battery cables because it would get better after I had loosened everything up, clean the cables, and then reconnect everything. A couple of days later, same thing. Slow starting. I finally decided to do a voltage drop test and found that the battery cut off switch had an insane amount of resistance through it. I removed the battery cut off switch and have never had a problem since.

Not sure if your truck has a cut off switch or not. But figured I'd throw in my two cents.