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2009 Mack CHU613 cruise and jake not working

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Hello all. I have a 2009 Mack CHU613 cruise and jake don't work. The fuse for the cruise, 10 amp blows immediately when I turn the key on. I have the lightning bolt and was trying to get the code, but I'm assuming you need the cruise fuse to work to get that 2 digit code. I have replaced the whole fuse panel in it, as a couple slots were real sloppy. We've tested the wiring from the switch all the way up to the valve covers where the jake solenoids are and all wires check ok with continuity. Any and all help or suggestions would be greatly appreciated. Thanks for your help or suggestions in advance. Also. the driver who's been driving Macks for ever has a question about a button, it looks like a key. Its the second button from the right or third from the left, any guesses? Thanks again.


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Most likely you have a short, and that key button is an accessory switch that is powered with the key on and off. 

Edited by Onyx610
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Try isolating the short. First put in a circuit breaker so you are not replacing fuses while testing. Disconnect one thing at a time that the fuse supplied power too. I dont have any wiring diagrams to send you to help with. 


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