Duramax Diesels Forum Truck of the Week
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Old 06-07-2011, 11:40 AM
jkaps jkaps is offline
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Default Brake controller fuse

Hey everybody, I got an 06 3500 sierra and was wondering is there a fuse or breaker for the brake controller. I know if you don't use the factory wiring harness pigtail you have to put a breaker inline somewhere. I put the P3 in and it had a premade harness that goes from the controller to the fuse box and i can't find the fuse or breaker. Any help would be greatly appreciated
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84 Chevy K30 srw restored inside and out to much to list, occasional sled puller

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Old 06-07-2011, 02:33 PM
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It should be pre installed at the factory, it is under the hood labeled either stud #2 or Aux B. The fuse that everybody talks about adding is Stud #1 or Aux A which is for the 12V + circuit in the trailer plug, not the brakes.
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Old 06-07-2011, 05:18 PM
jkaps jkaps is offline
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thanks for the reply, so if i am understanding correctly there is a fuse that controls the entire plug?
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06 GMC cclb drw LBZ, transgo jr, pump rub mod, diamond eye downpipe, PPE deep trans pan, line-x, B&W turnover ball & 5th wheel adapter, pcv reroute, BD exhaust manifold, MBRP 5" SS downpipe back exhaust,EFI live by Idaho Rob w/dsp5 switch,EGR blocked,Air Dog II 165, PPE race valve,EDGE CTS insight monitor,MAG-HYTEC rear diff cover,bilstien 5100's,AFE stage 2 intake

02 Dodge qbsb 2500 6 spd cummins Smarty,egt/boost/fuelpressure gauges, fass pump, volant airbox, cipa mirrorrs,line-x,bilstien 5100's mag-hytech rear diff cover,adjustable boost elbow

84 Chevy K30 srw restored inside and out to much to list, occasional sled puller

82 Chevy K30 drw work truck/beater
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Old 06-07-2011, 06:03 PM
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Well the aux A(or stud 1) fuse is just the constant hot (trailer battery charge) in the plug. It's the terminal in the upper right corner of the 7-way plug. Aux B(or stud 2) fuse is just for the power feed wire under the dash for the brake controller.
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Old 06-08-2011, 11:13 AM
jkaps jkaps is offline
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thanks, I"ll take a look today
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06 GMC cclb drw LBZ, transgo jr, pump rub mod, diamond eye downpipe, PPE deep trans pan, line-x, B&W turnover ball & 5th wheel adapter, pcv reroute, BD exhaust manifold, MBRP 5" SS downpipe back exhaust,EFI live by Idaho Rob w/dsp5 switch,EGR blocked,Air Dog II 165, PPE race valve,EDGE CTS insight monitor,MAG-HYTEC rear diff cover,bilstien 5100's,AFE stage 2 intake

02 Dodge qbsb 2500 6 spd cummins Smarty,egt/boost/fuelpressure gauges, fass pump, volant airbox, cipa mirrorrs,line-x,bilstien 5100's mag-hytech rear diff cover,adjustable boost elbow

84 Chevy K30 srw restored inside and out to much to list, occasional sled puller

82 Chevy K30 drw work truck/beater
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