Need to do sharp turns with a trailer

Im climbing a mountain with my semi with a short trailer attached and i need to do sharp turns. When im making sharp turns it seems that i reach a limit and truck doesnt want to turn anymore. I make sure semi and trailer arent making contact by removing the sleeping cabin but i think the turning limit comes from the attachment point(Is that called the fifth wheel?). I need to improve this turning limit. Do i need to change something in fifthwheel.jbeam ?

 

I think he means the trailer is jackknifing.

 

ah actually trailer is a mod so maybe problem is that, ill still post the video in 10 minutes xd
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i just tested trailer on grid map there were no problems. Sorry for useless post i did some more testing and saw why it wasnt turning: i trying to carry a 52ton trailer up a mountain, there was a U turn at 10 degrees upwards and i realized while turning my trucks front rear wheel was getting stuck to trailer, i was able to do same turn with ease without the cargo. Thanks for the quick responses though i probably would have kept blaming the trailer
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So now im wondering, can i make fifth wheel raise higher for these situations? I know about ctrl-H but it doesnt raise it enough for me, can i change how much i can raise from jbeam files?