eviiil Posted September 28, 2009 Share Posted September 28, 2009 I have a 2007 MACK MR Cabover concrete pump truck and i am trying to figure out the wiring the stereo.....Somebody decidied to cut the stock wiring harness on it....so now i have a bunch of white wires all bundled together and one black wire....assuming that black wire it hot wire all help is appreicated thanksmike Quote Link to comment https://www.bigmacktrucks.com/topic/10835-wiring-2007-mack-mr-stereo/ Share on other sites More sharing options...
RowdyRebel Posted September 29, 2009 Share Posted September 29, 2009 I have a 2007 MACK MR Cabover concrete pump truck and i am trying to figure out the wiring the stereo.....Somebody decidied to cut the stock wiring harness on it....so now i have a bunch of white wires all bundled together and one black wire....assuming that black wire it hot wire all help is appreicated thanksmikeGet yourself a multimeter. One wire will have power when the key is off (to maintain radio presets and the time setting). One wire will have power when you turn the key on (powers on the stereo). I would guess the black wire would go to ground...but trace it to be sure. If you find the two power wires, you can run a new wire to the chassis to ground it. The other wires likely go to the speakers. Most hard-core car audio guys will tell you to run new wires to the speakers instead of using the stock speaker wire...so those really don't matter if you choose to do that. Quote When approaching a 4-way stop, the vehicle with the biggest tires has the right of way! Link to comment https://www.bigmacktrucks.com/topic/10835-wiring-2007-mack-mr-stereo/#findComment-41136 Share on other sites More sharing options...
Mackpro Posted September 30, 2009 Share Posted September 30, 2009 I have wiring diagrams for both MR and MRU's and can give wire #'s if needed. Just need to know if its a MR or MRU. Last 6 of vin # would help also. Quote Link to comment https://www.bigmacktrucks.com/topic/10835-wiring-2007-mack-mr-stereo/#findComment-41183 Share on other sites More sharing options...
eviiil Posted October 4, 2009 Author Share Posted October 4, 2009 awesome i will get back to you once i get to work and get that info i know for a fact they are MR's not the MRU's I think model number was like MR 668? or something along them lines thanks alot i knew someone would have that Quote Link to comment https://www.bigmacktrucks.com/topic/10835-wiring-2007-mack-mr-stereo/#findComment-41389 Share on other sites More sharing options...
HK Trucking Posted October 5, 2009 Share Posted October 5, 2009 I have a 2007 MACK MR Cabover concrete pump truck and i am trying to figure out the wiring the stereo.....Somebody decidied to cut the stock wiring harness on it....so now i have a bunch of white wires all bundled together and one black wire....assuming that black wire it hot wire all help is appreicated thanksmikeIt never ceases to amaze me that when someone decides to replace a stock radio with an aftermarket radio, they cut the wiring on the harness side of the connector.In that situation it makes much more sense to cut on the radio side of the connector and hook up the aftermarket radio, that way in the future you can just unplug the connector and plug in another radio with the Mack connector on it if you want.I've run into that situation before on used trucks that I bought. It's not that hard to figure out the wiring, but it's much easier to just plug in if the connector is still there.. Quote "If You Can't Shift It Smoothly, You Shouldn't Be Driving It" Link to comment https://www.bigmacktrucks.com/topic/10835-wiring-2007-mack-mr-stereo/#findComment-41444 Share on other sites More sharing options...
Mackpro Posted October 5, 2009 Share Posted October 5, 2009 Here is the wiring for the radio on an MR, hope is is clear enough. Quote Link to comment https://www.bigmacktrucks.com/topic/10835-wiring-2007-mack-mr-stereo/#findComment-41459 Share on other sites More sharing options...
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