Rescuing this one from that "other place"
FOR YOUR INFO file..
Did not want to step on any vendor toes, nor did I want to drag up earlier posts of same subject with a different status...
Installed the plug-n-play third light brake modulator. Some time later, got the ESP intervention light steady on (car with squiggly lines). Did the key off/restart trick and reset. As miles ticked on, started getting the ESP light more often. Found the brake lights failing to go off when pedal released. So, ESP light illuminate and check brake lights to find steady on.
After perusing numerous posts on the brake light modulator, I removed it. Ran some stationary brake pedal/switch tests, short term, long stop light, waiting for train to pass as mentioned in another post... Brake lights immediately went out with pedal release. No noticeable delay or constant on as when the brake light modulator was installed. Six hundred miles on the road since removal and no ESP light.
Conclusion: Under troubleshooting philosophy, last thing done, first place to start. The brake light modulator was causing a problem for me. Whether it was the brake light modulator or an early warning of a problem I will incur later is unknown. But for now, all is good.
...and now you know.
These are from my content... I have no plans to pull others content:ie: Pictures, ideas postings... Clear text in response to my content I believe to be shared content...
If anyone sees fault in this, SPEECH UP!