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FJR Motorcycle Forums
Technical & Mechanical Problems
Gen II Headlight failure
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<blockquote data-quote="wfooshee" data-source="post: 901145" data-attributes="member: 6354"><p>2 relays control the lights, not just the hi/lo. There is a headlamp relay which energizes the lights on engine start, and then the hi/lo relay switches according to the hi/lo switch setting on the handlebar.</p><p></p><p>Wire colors:</p><p></p><p>Headlight relay:</p><p></p><p>Red/yellow 2 times, key-switched 12V</p><p></p><p>Yellow/white, grounded by ECU on engine startup to energize the relay</p><p></p><p>Green/blue, 12V to hi/lo relay when this relay energizes.</p><p></p><p>Hi/Lo relay:</p><p></p><p>Green/blue, 12Volts from headlamp relay</p><p></p><p>Black, ground</p><p></p><p>Blue/black, 12V from dimmer switch when high beam is selected</p><p></p><p>Green, 12V out to headlamp low beam</p><p></p><p>Yellow 12V out to headlamp high beam</p><p></p><p>There will be no 12-volt level at the hi/lo relay if the headlamp relay isn't working. Lights need 12 volts on the Green/blue. If the dimmer switch is set to high, you'll see 12 volts on the Blue/black wire and the relay will click, but no lights work. It just selected hi beam, but without 12V on the Green/blue there's nothing to switch from high to low. The hi/lo relay will click with the key on, without engine start, just by flipping the hi/lo switch on the grip.</p><p></p><p>You're troubleshooting the wrong relay, I think. The fact that you say the Green/blue wire is not hot with the engine running tells me the headlamp relay (the <em>other</em> one) isn't working.</p></blockquote><p></p>
[QUOTE="wfooshee, post: 901145, member: 6354"] 2 relays control the lights, not just the hi/lo. There is a headlamp relay which energizes the lights on engine start, and then the hi/lo relay switches according to the hi/lo switch setting on the handlebar. Wire colors: Headlight relay: Red/yellow 2 times, key-switched 12V Yellow/white, grounded by ECU on engine startup to energize the relay Green/blue, 12V to hi/lo relay when this relay energizes. Hi/Lo relay: Green/blue, 12Volts from headlamp relay Black, ground Blue/black, 12V from dimmer switch when high beam is selected Green, 12V out to headlamp low beam Yellow 12V out to headlamp high beam There will be no 12-volt level at the hi/lo relay if the headlamp relay isn't working. Lights need 12 volts on the Green/blue. If the dimmer switch is set to high, you'll see 12 volts on the Blue/black wire and the relay will click, but no lights work. It just selected hi beam, but without 12V on the Green/blue there's nothing to switch from high to low. The hi/lo relay will click with the key on, without engine start, just by flipping the hi/lo switch on the grip. You're troubleshooting the wrong relay, I think. The fact that you say the Green/blue wire is not hot with the engine running tells me the headlamp relay (the [I]other[/I] one) isn't working. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Gen II Headlight failure
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