2020 LTZ 4 High mod help

[Thomas White]

Hi guys, new to the forum and first post, I have been reading often though since buying my truck a couple of months ago. I have a 2020 LTZ with a 6.2. I've seen on older trucks being able to have the low beams stay on when the high beams are engaged by jumping a diode between relays. I can't find any information on doing this on the 2020. I've found plenty of info about auto on fog lights but not this. Any help would be greatly appreciated.

[Thomas White]

Or if anyone has the diagrams for the under dash BCM pins I could most likely figure it out from there. 

[jeepincbum11]

https://www.gm-trucks.com/forums/topic/162734-foglights-on-with-high-beams/

 

[Thomas White]

14 minutes ago, jeepincbum11 said:

https://www.gm-trucks.com/forums/topic/162734-foglights-on-with-high-beams/

 

Thanks for sharing this, unfortunately it doesn't apply to the 2020. The relay and fuse setup is completely different. There is only one headlight relay instead of one for high and low beams. Also the new style relays completely block the contact points underneath them when they are installed.

[jeepincbum11]

46 minutes ago, Thomas White said:

Thanks for sharing this, unfortunately it doesn't apply to the 2020. The relay and fuse setup is completely different. There is only one headlight relay instead of one for high and low beams. Also the new style relays completely block the contact points underneath them when they are installed.

Sorry - read the post too fast.  I thought you wanted the fogs on with highs.  

[jeepincbum11]

Maybe the electric diagrams will help? 

 

https://www.gmupfitter.com/pdflists/view/45

 

 

[ArcherMP]

52 minutes ago, Thomas White said:

Thanks for sharing this, unfortunately it doesn't apply to the 2020. The relay and fuse setup is completely different. There is only one headlight relay instead of one for high and low beams. Also the new style relays completely block the contact points underneath them when they are installed.

How about this one: https://boostautoparts.com/products/6hi

[jeepincbum11]

How about this   https://boostautoparts.com/products/6hi

 

Archer beat me to it  LOL

 

This -  

 

 

[Thomas White]

6 minutes ago, ArcherMP said:

How about this one: https://boostautoparts.com/products/6hi

That gives me the information that I need. It seems the low beams actually do stay on when the high beams are on. For some reason I thought it toggled back and forth between them. Adding the fog lights will be nice too though. Thanks for the help.

[jeepincbum11]

Basically the info is the same but the diodes are much cheaper way to go.   If you want to send me a message with your address ill mail you some for free.   I have a hundred or so left over. 

 

[Thomas White]

Just now, jeepincbum11 said:

Basically the info is the same but the diodes are much cheaper way to go.   If you want to send me a message with your address ill mail you some for free.   I have a hundred or so left over. 

 

I appreciate that, I actually ordered some that are getting delivered this afternoon. That's why I was doing the research.

[Maven]

its super simple, a single diode between the fog lamp relay control circuit 1317, terminal 10 in BCM X5, and high beam relay control circuit 1969 terminal 18, BCM X5 gets the job done 

[bobbobtar]

I went from terminal 10 in the BCM X5 to terminal 22 in BCM X5. The fogs come on any time the parking lights come on (you do not have to push the fog light switch) and stay on with high beam