Cargo/rev & fog w/ high mod issues

[A.J. Paul]

2014 GMC Sierra sle 5.3

 

I wired my cargo and reverse together at the BCM and the fog w high beam together with a diode. Followed the info I found on here and verified with boost auto parts videos and Mitchell wiring diagrams.  

 

 

My issue is when I do this, my radio quit. Tried it 2 weeks ago, worked good for 3 days then lost radio.  Also had a failed battery so changed battery and removed jumper wires. Took 2 days before the radio started to work again. Thought it must have been weird battery and voltage issue. Reinstalled jumper wires tonight and radio cut out again. The whole display is dark and the comm network to the BCM shuts off. 

 

Anyone else see issues like this? 

 

Thanks 

[Truckboattruck]

Double check the direction of the diodes and maybe try it fog to parking lights instead of to high beams and see what happens. Could have even messed up the connection with some of the wires maybe, just thinkin out loud though.

[MikeBMW]

I bought an AutoSync with BTDiesel mods done online and then uploaded to the BCM, or HMI, depending on what you want.
Many options such as this without wiring and diodes and such.

[Ravenkeeper]

On 12/2/2021 at 7:22 PM, A.J. Paul said:

2014 GMC Sierra sle 5.3

 

I wired my cargo and reverse together at the BCM and the fog w high beam together with a diode. Followed the info I found on here and verified with boost auto parts videos and Mitchell wiring diagrams.  

 

 

My issue is when I do this, my radio quit. Tried it 2 weeks ago, worked good for 3 days then lost radio.  Also had a failed battery so changed battery and removed jumper wires. Took 2 days before the radio started to work again. Thought it must have been weird battery and voltage issue. Reinstalled jumper wires tonight and radio cut out again. The whole display is dark and the comm network to the BCM shuts off. 

 

Anyone else see issues like this? 

 

Thanks 

Please, post a picture of your BCM with jumpers.