So for about a month, I've had an odd problem with my 1999 Triumph Adventurer, namely that the turn signals do not work until the bike has been running about 20 minutes. After that, the signals front and back work just fine. But shut the bike down and restart and the signals are back to not working for about 20 minutes of the engine running. Fuses are good and I've swapped out the signal relay and the problem persists. While I do own a multimeter, I am sadly uneducated on how to use it to figure out the cause of this problem. Any advise on next steps to take would be most welcome, as this is my commuter vehicle and my commute is about 22 minutes long. Thanks very much!