Iafarmer Posted December 14, 2015 Share Posted December 14, 2015 My am/fm radio stopped working. It is original, has no sound, no static, nothing. But it lights up and all buttons operate like normal just no sound. Swapped radio with another Mack cx613 and it works fine in the other truck. The radio from that truck does the same thing in this truck. I have inspected the harness and can't find anything wrong. Checked speaker connections. I think the problem might be the VECU. I am just not 100%. Are the speakers/radio controlled by the VECU? The other two cx613's are newer and I believe they are cxn's. Could I swap the VECU's with one of those trucks without any problems? Any help or advice will be much appreciated. Quote Link to comment Share on other sites More sharing options...
turckster Posted December 15, 2015 Share Posted December 15, 2015 On your 2004 its just a plain jane radio. You should have a 12v ignition source, battery voltage and a ground with either 2 or 4 speakers depending on the configuration. The newer truck radios have diagnostic capabilities so they are connected in the vehicle data system (j1939 hi speed datalink and the slower 1587 dtatlink). The newer radios are VIN specific so swapping one of them to another chassis would create fault codes. Quote Link to comment Share on other sites More sharing options...
Dirtymilkman Posted December 15, 2015 Share Posted December 15, 2015 Does yours have an amplifier in the sleeper? If so that my be fried. Quote Link to comment Share on other sites More sharing options...
bbigrig Posted December 15, 2015 Share Posted December 15, 2015 It could be as simple as a bad antenna. Find another and plug it in. Quote Link to comment Share on other sites More sharing options...
Iafarmer Posted December 15, 2015 Author Share Posted December 15, 2015 This is just a day cab. Is there an factor amp in a day cab? I don't think there is a amp wire going to my radio. This c x truck was built in 2004 but I believe it is considered a 2005. The other two c x n are day cab's also. One is a 2007 and the other is a 2008. All of them are pretty much identical inside and out. The reason I asked if the radio speaker was vecu controlled because I thought I traced the wires there. Unless I am getting confused on how the wires are labeled. Tomorrow I will try ohm testing to make sure. Quote Link to comment Share on other sites More sharing options...
Iafarmer Posted December 15, 2015 Author Share Posted December 15, 2015 Good idea I will try another antenna tomorrow. Just over looked that because there is no sound at all that comes out. I thought there would be static at least. 1 Quote Link to comment Share on other sites More sharing options...
turckster Posted December 16, 2015 Share Posted December 16, 2015 With a bad antenna there should at least be static. I don't think diagnostic capabilities on the radios started until 2010 or so. All the year models you listed should have just pain ol everyday type radios. I would measure resistance of the speakers from the harness connector, they should be at least 4 ohms. Open or high resistance tells me bad speakers or damaged wire(s) Quote Link to comment Share on other sites More sharing options...
41chevy Posted December 16, 2015 Share Posted December 16, 2015 Check for a bad radio ground too. Paul Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment Share on other sites More sharing options...
RJ Agro Posted July 8, 2021 Share Posted July 8, 2021 I am having the same problem with my 2013 cxu 613. Radio lights up no sound no static. Just wondering if you ended up figuring out the problem. Quote Link to comment Share on other sites More sharing options...
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