ride1061
New member
- Location
- Upstate NY
I am trying to install a set of LED driving lights to serve as auxiliary "high-high" beams on my Mk7.5 with the lighting package. I'm fully aware these are already excellent headlamps, but my commute takes me through some very rural roads where I would enjoy a bit more throw distance.
On my Mk6 GTI, I mounted a pair of these behind the grill and the long distance light output was excellent. On that car I had a euroswitch but never installed rear fogs. I wired the LED pods using two relays in series, so the lights only would be on when the light switch had rear fogs "on" AND when the normal high beams were on. This was a good permissive so they weren't ready to use if I didn't really need them. I ran a repair wire to the rear fog position on the headlight switch, and tapped the high beam trigger wire. Mounted both relays behind the fuse box door and it worked like a charm.
Relevant link #1
Relevant link #2
Flash forward to the 2018 GTI. After doing some initial research I see that these LED lights do not have a dedicated high beam trigger wire - instead, it's all CAN bus controlled. The wiring diagrams for the headlamps are here. I considered tapping into the turn signal switch below the column, but the high beam "on" (i.e. pushed forward) doesn't "stick" in that position, so I doubt that would provide a constant signal to use for a relay.
If my understanding of CAN bus is correct, the only way to piggy back the high beam signal is to listen for the CAN bus packet corresponding to "high beams on". Does anyone have any experience with this before I start digging through arduino forums? I'm far from an expert on the matter. I came across this product which seems like it's exactly what I need, but I have no idea if it actually work... Any thoughts are appreciated. Thanks!
On my Mk6 GTI, I mounted a pair of these behind the grill and the long distance light output was excellent. On that car I had a euroswitch but never installed rear fogs. I wired the LED pods using two relays in series, so the lights only would be on when the light switch had rear fogs "on" AND when the normal high beams were on. This was a good permissive so they weren't ready to use if I didn't really need them. I ran a repair wire to the rear fog position on the headlight switch, and tapped the high beam trigger wire. Mounted both relays behind the fuse box door and it worked like a charm.
Relevant link #1
Relevant link #2
Flash forward to the 2018 GTI. After doing some initial research I see that these LED lights do not have a dedicated high beam trigger wire - instead, it's all CAN bus controlled. The wiring diagrams for the headlamps are here. I considered tapping into the turn signal switch below the column, but the high beam "on" (i.e. pushed forward) doesn't "stick" in that position, so I doubt that would provide a constant signal to use for a relay.
If my understanding of CAN bus is correct, the only way to piggy back the high beam signal is to listen for the CAN bus packet corresponding to "high beams on". Does anyone have any experience with this before I start digging through arduino forums? I'm far from an expert on the matter. I came across this product which seems like it's exactly what I need, but I have no idea if it actually work... Any thoughts are appreciated. Thanks!
