New truck (to me) with issues

Take it back to the dealer you bought it from, Oh, you bought from a private party without checking the truck out?

 

look behind the dash. There is a air switch most likely.

 

electrical rely switch has failed. Where it is on a Volvo I could not say. 900 k on tact hope you got her at a good price because plan on her pulling your chain on this type of stuff. Good luck.

 

Don't feel bad, 2013 389 Pete with A Cummins in it, and she only runs on a full tank before air locking.

 

ok For the parkind brake switch its simple. Remove the panel behind your clutch pedal all the way to the left of the dash. once removed look on the firewall there will be about 10 air switches look on the manifold it should write PBS of it's the one with the brown connector unlike the other ones it has a different connector all together changing it it's a little tough being that it's a push in fitting make sure you have a small flat screwdriver put it between sensor and manifold then try to push screwdriver toward manifold and pull sensor. That's 99% your problem with parking brake. without pulling out some codes hard to find the problem with check climate control most likely control is bad but need codes and some diagnostics to be sure.

 

light cotrol will always pop up if you have led in the back and noone programed them or there is some light thats not working

 

Did you preprice the repairs to know it would still be a good deal when all the issues were fixed? Doesn't sound like it as you don't even have this problem diagnosed. Good luck!