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Pulled the relay, disassembled. Shiny as a new penny. I went ahead and replaced it with the O'Reillys unit listed in the tech vault. R3177. Working fine, but it was intermittent so time will tell. One question, the hella listed 87a, the r3177 listed as 87q. What's the difference in A or Q ?


That relay has been a source of failure, as well as two adjacent dead shorts on two different Speedmasters for me. Is the electrical design flawed at or around that point (headlight relay) of our wiring? Too bad DeCosse bugged out, he seemed to understand bike wiring at a level few do. Anybody else here that can explain it to me like I'm a dummy, and I still kinda understand it? Once, it's happenstance, twice, a coincidence, three times and a pattern starts to form.