Xtra7973 Posted September 22, 2022 Share Posted September 22, 2022 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. Quote Link to comment Share on other sites More sharing options...
Onyx610 Posted September 23, 2022 Share Posted September 23, 2022 (edited) Most likely you have a short, and that key button is an accessory switch that is powered with the key on and off. Edited September 23, 2022 by Onyx610 1 Quote Link to comment Share on other sites More sharing options...
Onyx610 Posted September 23, 2022 Share Posted September 23, 2022 A lot of body builder companies tie into that switch. Mack just makes it available Quote Link to comment Share on other sites More sharing options...
Solution Vmac3 Posted September 23, 2022 Solution Share Posted September 23, 2022 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. V Quote Link to comment Share on other sites More sharing options...
Xtra7973 Posted May 22, 2023 Author Share Posted May 22, 2023 (edited) I know this thread is older, but I wanted to update it. Turns out the driver was pooping fuses in the fuse box like tic tacs, if it was a 15 amp fuse, didn't matter just stick another in. Replaced the now melted fuse panel, trace a short, it all works fine now. Thankfully multiple mechanics looked at it. The first mechanic was sure be traced the short under the valve cover, second mechanic found it by accident, next to a aftermarket filter kit that someone put on that this truck didn't need, so in the removal process, the short was found due to the aftermarket kit that was installed. Thank you all for your help in keeping this truck rolling! Edited May 22, 2023 by Xtra7973 Added to post 1 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.