Peak Sponsor (Level 2)
Our design communicates with the vehicle's computers over the CAN bus.Is that connector that you are intercepting just the other end of the wires that go to the back of the ESS switch and LED? If you are monitoring the LED status as an indicator of whether the ESS is enabled, it looks like you came up with a similar solution to what I designed while waiting on my JL to be delivered, except I was going interrupt the circuit near the back of the ESS switch instead.
Locating it there makes your system a bit quicker to install.
I was planning on interrupting the wiring and running it to a control module in the glove box area with some small toggle switches hidden in there to control it.
Nice job though... Good design for those car owners who are not that electrically inclined.
I didn't bother to look for a CANBUS solution since a quick web search didn't come up with any public domain documentation on the protocol. I did find a video of someone changing out a radio on the JL and that allowed me to see the back of the switches and it *looked* like it had the right number of wires for just simple hookups to the ESS switch and the LED, so I assumed that the vehicle's computer was handling that and just taking the input from the switch and setting the LED itself instead of having another microcontroller in the switch assembly that handles it. Having another microcontroller handling that just seemed like too convoluted of a way to handle the issue, but I guess I shouldn't underestimate the potential of the kiddie engineers these days to take a simple requirement and make an overly complex solution for it.Our design communicates with the vehicle's computers over the CAN bus.
Your method is clever and should work, but the ESS switch is I believe unfortunately soldered on a circuit board internal to the 'Integrated center switch bank module', so it would be difficult to implement without removing the module and doing internal surgery...something most owners probably would not care to do.
The CAN bus solution we have is very reliable and based on a design which we have shipped thousands of on various FCA platforms.