Sorry, this is a long post but I wanted to list everything I’ve checked so far.
I have a 2006 V-Star 650 that headlight doesn’t work and I’ve tried checked just about everything. I have an electrical engineering degree so debugging electrical issues is usually pretty easy for me. The problem is the circuit diagram in the PDF service manual floating around is outdated/incomplete and also things become very difficult to trace once a wire goes into a bundled wiring harness.
Questions for people:
I’m out of ideas so my next step might just be to bypass this white relay and tie blue/black to red/yellow so the dimmer switch will be getting +12V.
computer behind battery looks like this one:
http://www.ebay.com/itm/07-Yamaha-V...Parts_Accessories&hash=item43d0c3accb&vxp=mtr
I have a 2006 V-Star 650 that headlight doesn’t work and I’ve tried checked just about everything. I have an electrical engineering degree so debugging electrical issues is usually pretty easy for me. The problem is the circuit diagram in the PDF service manual floating around is outdated/incomplete and also things become very difficult to trace once a wire goes into a bundled wiring harness.
- Bike is completely stock as far as I can tell. No aftermarket lighting
- all other lighting is working fine; didn’t notice any check engine lights when i started it last
- with the key in the ‘On’ position, engine still off, headlight remains off in either dimmer switch position
- Bulb has continuity
- Headlight fuse has continuity and also +12V on both sides of the socket. I also tried swapping in a spare fuse
- No voltage at the bulb socket. One of the 3 socket wires has continuity to ground/negative
- No voltage on any 3 of the contacts on the handlebar dimmer switch
- Dimmer switch is working correctly. I tested for continuity in both positions at the harness connector
- No voltage on any of the 3 wires for the dimmer switch on the connector for the handlebar controls (measured on bike side connector)
- Blue/Black wire on that connector probably leads to a white relay mounted behind the battery box. Replaced this relay with no effect
- White relay has 4 wires: (2) red/yellow, (1) blue/black, (1) white/black
- white/black wire goes to the computer that is behind the plastic panel in the battery box (ignition module I think, looks like eBay link below)
- Blue/black goes to dimmer switch connector (it has continuity)
- Red/yellow go to the headlight fuse
- Blue/black reads 0V at the relay. I think if this was 12V the headlight would work
Questions for people:
- The headlight should come on without starting the engine right? Bike is disassembled so this would be a pain to test right now
- What is the purpose of this white relay? Is it some sort of headlight delay until the bike is started?
- What is this white wire going to the computer from the relay? I disconnected it and it has +12V on it at the relay
- Any suggestions on where to look next?
I’m out of ideas so my next step might just be to bypass this white relay and tie blue/black to red/yellow so the dimmer switch will be getting +12V.
computer behind battery looks like this one:
http://www.ebay.com/itm/07-Yamaha-V...Parts_Accessories&hash=item43d0c3accb&vxp=mtr