Nick mack rd686s Posted September 12 Share Posted September 12 Please can I have advice on my Jake brake. My engine is a EM6 285 and the Jake brakes do not work, I think someone has tried to by pass something as I have 1 blue wire come straight from the switch to the cylinder head and the other wire comes from a switch on the fuel pump to the cylinder head. I tried putting some wires that I found behind the dash back on the Jake brake and it worked but we I tried the accelerator and the Jake brake was still working and the engine cut out. Even with the engine on tick over the Jake brake was still working trying to cut the engine. Does any one have a diagram and a parts list so I can make sure there is nothing missing. Quote Link to comment https://www.bigmacktrucks.com/topic/74546-jake-brake-help/ Share on other sites More sharing options...
Joey Mack Posted September 12 Share Posted September 12 Check the operation of the micro switches with an Ohm meter. The one on the injection pump and the one on the clutch pedal. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74546-jake-brake-help/#findComment-558403 Share on other sites More sharing options...
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