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Old 1 Week Ago
Bryan83taco Bryan83taco is offline
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Default Iron brake light help

Need some help guys. My bikes been down for a few months now. ‘12 Iron 883.

Can’t figure out the rear brake lights.

First, with the ignition on, it seems as though the brake lights are ON. Like I’m pressing on the brakes. When I press the front brake, all lights go out on the right (run and brake, so no lights) and the left side it seems like the brake light goes off and leaves the run light on.

Pretty stumped. Ive swapped out a few sets of lights. Not sure if I should just replace the front and rear brake switch and see if that fixes it. Any ideas?
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IXL2Relax IXL2Relax is offline
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There is a connector under the seat identified as 7A/B - 6-pins

Main Harness - Connector 7A/B - Under Seat:
Pin1 - Orange/White (From Accessory Power Fuse - Running Taillight)
Pin2 - Brown (RIGHT TS Signal)
Pin3 - Blue (From Lights Power Fuse - HDI Taillight)
Pin4 - Red/Yellow (Brake Signal)
Pin5 - Violet (LEFT TS Signal)
Pin6 - Black (Common Ground)


From this connector the wiring goes to the 'Tail Lamp Converter Module' - That module controls the rear TS lights & the Tail Light...

Disconnect 7A/B and use a multimeter to verify whether the signals coming thus far are correct for the operation of the turn signals & the brake switches...

IN OTHER WORDS, check to see that you DO NOT HAVE POWER on the brake wire (Pin4) when both brake levers are untouched.

Also check to see that you DO NOT HAVE POWER on either TS wire (Pin2 or Pin5) when the Turn Signal switches are untouched. (The Turn Signals probably won't actually flash with 7A/B disconnected - even the fronts - but you should not see power when they're off and you should see power (Pin2 or Pin5) when they are trying to work)


If you DO have power on the brake wire (Pin4) even though both brake levers are untouched - It is very likely that one of the switches are out of place or broken...

Check the Front Brake switch first as it is often misaligned if the lever or the right switch housings have been serviced in any way...


If all the wires have the correct signals on them at 7A/B (when disconnected) then the Converter Module may be defective...


The wiring from the converter module to the actual light housings runs under the fender and can be damaged by the tire rubbing & breaking the wires or making them bare - Check that also...


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Thanks! That’s exactly what I needed. But....my battery was dead. I’ll get a new one this week and report back.
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