Blckshdw
Moderator
Only other thing I can think of, cuz I've seen this happen with pigtails from Amazon/Ebay, is if TRS installed the connectors backwards, so the headlight signal is passing through the "ground" side of the capacitor link, and it's never getting to the capacitor.
You can try flipping the connectors around on both ends of the capacitor link to test it. The tabs won't lock, but that's OK for testing functionality.
You can try flipping the connectors around on both ends of the capacitor link to test it. The tabs won't lock, but that's OK for testing functionality.