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Hello, my name is***** black wire at bulb should have ground at all times and the light green/orange should have power when pressing on the brakes. Check both and let me know what is missing. It sounds like problem is ground or bulb, keep me updated. Thanks.
Voltage dropping points toward poor connection. Pierce wire about 3 inches back so you can monitor voltage on wire while using brakes instead of connector. If voltage remains good on wire when pressing brakes that would mean bulb connector is the problem. Let me know how it goes, thanks.
The signal switch wouldn't cause this, it sounds like a wiring problem. The brown wire is actually the one for brakes too. What is voltage on brown wire while pressing brakes both with bulb plugged and unplugged?
It looks like brown is for the brake lights according to my wire daigram. On other side does brown have voltage when pressing brake lights?
But the green wire has voltage when pressing brakes? Sorry about questions, diagrams just are not that straight forward. Thanks.
Green wire gets signal from the multifuntion/turn signal switch. So next step is to access wire at switch to see if voltage drops when pressing brakes, if so switch is problem. If not wiring between switch and bulb is problem. Let me know how it goes or if you have more questions, thanks.