Engine brake staying on

[Luckyjayb]

06’ international eagle 9900i with a cm870 and double bunk sleeper. I put the easy jake brake switch on my shifter and it’s great. Well Friday night after I got south of Nashville on I-65 headed back just to south of Birmingham, Al, my engine brakes would not disengage. Pain in the butt shifting through traffic with them on and grossed out. I ohm’d the easy jake wires and they were fine. There is no relay or breaker for the engine brakes. It has the original engine brake switch on it and I’m wondering if that could have failed. Any thoughts or ideas?