Trailer surge brakes

[nwmohunter]

I'm pretty sure my master cylinder is shot. Makes a clunk noise every time I take off from a stop. My question is will pulling the trailer cause any problems until I can get a new one? 

[fishinwrench]

No, not at all.   Trailer brake systems on fishing boat trailers are seldom operative after 5-6 years unless constantly maintained.   I won't even work on them, it's a waste of time/money.  Just drive a vehicle capable of stopping the rig without them and never depend on trailer brakes.  

[Ketchup]

Positive clunk is coming from trailer and not U-Joints on truck? Sometimes under load as in pulling a trailer, it will show more on the faulty U-Joints. 

[nwmohunter]

Thanks, trailer is 13 years old. Don't think it's my truck but will check. Thanks guys.

[Dutch]

That clunk sound is more than likely a worn out actuator.  That same thing happened to me.  I had the system checked and everything was fine except the actuator.  A new actuator solved the problem.