Rear Lights
#1
09-14-2024, 03:25 PM
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Rear Lights
hey guys... on my limited the rear right bulb has stopped working in the run setting but works for blinking and brake... there is a control board of some sorts behind the main tail light and it is factory altho my indy ( who has not seen the bike yet ) says these are all aftermarket... do u think this is the culprit ? bulb has been replaced.. all works fine on left side just not the right...i cannot find this harley oem part anywhere.. thansk
#2
09-14-2024, 03:39 PM
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#3
09-14-2024, 03:45 PM
Not trying to be snarky, etc. but you'll have to do a lot better with the information you provide in your post if you expect any meaningful responses.
Year/model of bike, along with a pic or 2 of the components that you are describing will go a long way to getting resolution, especially if you cannot determine the parts to be OEM or aftermarket.
As of now, we don't know if this is regarding a factory tombstone light on a '48 or a Custom Dynamics LED light on a '23 CVO.
Nobody can help if they are guessing on the product in question.
Help us help you.
Year/model of bike, along with a pic or 2 of the components that you are describing will go a long way to getting resolution, especially if you cannot determine the parts to be OEM or aftermarket.
As of now, we don't know if this is regarding a factory tombstone light on a '48 or a Custom Dynamics LED light on a '23 CVO.
Nobody can help if they are guessing on the product in question.
Help us help you.
#5
09-14-2024, 04:07 PM
Join Date: Sep 2016
Location: FL East Coast /Western NC
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Not trying to be snarky, etc. but you'll have to do a lot better with the information you provide in your post if you expect any meaningful responses.
Year/model of bike, along with a pic or 2 of the components that you are describing will go a long way to getting resolution, especially if you cannot determine the parts to be OEM or aftermarket.
As of now, we don't know if this is regarding a factory tombstone light on a '48 or a Custom Dynamics LED light on a '23 CVO.
Nobody can help if they are guessing on the product in question.
Help us help you.
Year/model of bike, along with a pic or 2 of the components that you are describing will go a long way to getting resolution, especially if you cannot determine the parts to be OEM or aftermarket.
As of now, we don't know if this is regarding a factory tombstone light on a '48 or a Custom Dynamics LED light on a '23 CVO.
Nobody can help if they are guessing on the product in question.
Help us help you.
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07UltraGuy (09-14-2024)
#6
09-14-2024, 04:17 PM
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#7
09-14-2024, 04:54 PM
Seasoned HDF Member
I owned a 2012 FLHTK for several years and updated the the OEM turn signals to LEDs. There is no OEM part, from the factory, that causes the rear turn signals to function as run, turn, and brake lights.
Your Indy is most likely correct in his assumption.
The part you referenced does not make the rear turn signals function as running lights or stop lights. It is just the circuit board that the various rear lights plug into, when they function as designed from the factory. I'm not saying there cannot be an issue with that part, but the fact that the rear turn signal in question functions at all, suggests that circuit board is fine. You should know how the OEM system works, so you can diagnose just what part(s) may be causing the problem. It will avoid possibly buying an unneeded part.
This is how the lights are designed to work:
The rear turn signals are single filament #1156 bulbs. They only work as flashing turn signals, with amber lenses from the factory.
The front turn signals are dual filament #1157 bulbs. They work as both running lights and flashing turn signals, with amber lenses from the factory.
To get the rear turn signals to act as all three; running lights, turn signals, and brake lights... You need to add a run/turn/brake module. The module plugs inline between two connectors, the connector for the main harness that plugs into the connector for the rear lights harness. That connection is under the seat, cam plate side, back by the rear fender. That module varies the voltage to the single filament rear turn signal bulbs, to allow them to function like dual filament bulbs.
If your rear turn signals were functioning as run/turn/brake, and now one is only functioning as turn and brake, the wiring has an issue, or the R/T/B module has failed.
I would find that connection and remove any module (HD accessory or aftermarket) plugged in between the two connectors mentioned.
If the lights return to how they are supposed to function from the factory, then the module has failed, time for a new module.
If the lights still have an issue, then I would investigate the wires, connectors, bulbs, sockets, etc., that are aft of that connection for an issue (ie: shorted wire, broken wire, bad connection, etc).
Good luck and report to us what you find....
Your Indy is most likely correct in his assumption.
The part you referenced does not make the rear turn signals function as running lights or stop lights. It is just the circuit board that the various rear lights plug into, when they function as designed from the factory. I'm not saying there cannot be an issue with that part, but the fact that the rear turn signal in question functions at all, suggests that circuit board is fine. You should know how the OEM system works, so you can diagnose just what part(s) may be causing the problem. It will avoid possibly buying an unneeded part.
This is how the lights are designed to work:
The rear turn signals are single filament #1156 bulbs. They only work as flashing turn signals, with amber lenses from the factory.
The front turn signals are dual filament #1157 bulbs. They work as both running lights and flashing turn signals, with amber lenses from the factory.
To get the rear turn signals to act as all three; running lights, turn signals, and brake lights... You need to add a run/turn/brake module. The module plugs inline between two connectors, the connector for the main harness that plugs into the connector for the rear lights harness. That connection is under the seat, cam plate side, back by the rear fender. That module varies the voltage to the single filament rear turn signal bulbs, to allow them to function like dual filament bulbs.
If your rear turn signals were functioning as run/turn/brake, and now one is only functioning as turn and brake, the wiring has an issue, or the R/T/B module has failed.
I would find that connection and remove any module (HD accessory or aftermarket) plugged in between the two connectors mentioned.
If the lights return to how they are supposed to function from the factory, then the module has failed, time for a new module.
If the lights still have an issue, then I would investigate the wires, connectors, bulbs, sockets, etc., that are aft of that connection for an issue (ie: shorted wire, broken wire, bad connection, etc).
Good luck and report to us what you find....
Last edited by hattitude; 09-14-2024 at 05:16 PM.
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#8
09-14-2024, 05:03 PM
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I had that RUN/BRAKE/TURN module on my '13 King and it stopped working. That's when I switched everything to the Custom Dynamics LEDs, including the tail light to the low profile lens. The smart EQ from Custom Dynamics has other features than just a load EQ and makes the turns a run/brake/turn. Everything has a lifetime warranty, or until CD goes belly-up. Now's the time to make the jump to LED.I didn't think this H-D run/brake/turn module was factory. My King certainly didn't come with it.
Last edited by RKZen; 09-14-2024 at 05:11 PM.
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hattitude (09-14-2024)
#9
09-14-2024, 05:20 PM
Seasoned HDF Member
It is not on bikes from the factory.
It is from the Parts and Accessory Catalog, and is either dealer added or customer added after the bike is delivered from the factory......
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RKZen (09-14-2024)
#10
09-15-2024, 06:23 AM
Join Date: Sep 2016
Location: FL East Coast /Western NC
Posts: 364
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I owned a 2012 FLHTK for several years and updated the the OEM turn signals to LEDs. There is no OEM part, from the factory, that causes the rear turn signals to function as run, turn, and brake lights.
Your Indy is most likely correct in his assumption.
The part you referenced does not make the rear turn signals function as running lights or stop lights. It is just the circuit board that the various rear lights plug into, when they function as designed from the factory. I'm not saying there cannot be an issue with that part, but the fact that the rear turn signal in question functions at all, suggests that circuit board is fine. You should know how the OEM system works, so you can diagnose just what part(s) may be causing the problem. It will avoid possibly buying an unneeded part.
This is how the lights are designed to work:
The rear turn signals are single filament #1156 bulbs. They only work as flashing turn signals, with amber lenses from the factory.
The front turn signals are dual filament #1157 bulbs. They work as both running lights and flashing turn signals, with amber lenses from the factory.
To get the rear turn signals to act as all three; running lights, turn signals, and brake lights... You need to add a run/turn/brake module. The module plugs inline between two connectors, the connector for the main harness that plugs into the connector for the rear lights harness. That connection is under the seat, cam plate side, back by the rear fender. That module varies the voltage to the single filament rear turn signal bulbs, to allow them to function like dual filament bulbs.
If your rear turn signals were functioning as run/turn/brake, and now one is only functioning as turn and brake, the wiring has an issue, or the R/T/B module has failed.
I would find that connection and remove any module (HD accessory or aftermarket) plugged in between the two connectors mentioned.
If the lights return to how they are supposed to function from the factory, then the module has failed, time for a new module.
If the lights still have an issue, then I would investigate the wires, connectors, bulbs, sockets, etc., that are aft of that connection for an issue (ie: shorted wire, broken wire, bad connection, etc).
Good luck and report to us what you find....
Your Indy is most likely correct in his assumption.
The part you referenced does not make the rear turn signals function as running lights or stop lights. It is just the circuit board that the various rear lights plug into, when they function as designed from the factory. I'm not saying there cannot be an issue with that part, but the fact that the rear turn signal in question functions at all, suggests that circuit board is fine. You should know how the OEM system works, so you can diagnose just what part(s) may be causing the problem. It will avoid possibly buying an unneeded part.
This is how the lights are designed to work:
The rear turn signals are single filament #1156 bulbs. They only work as flashing turn signals, with amber lenses from the factory.
The front turn signals are dual filament #1157 bulbs. They work as both running lights and flashing turn signals, with amber lenses from the factory.
To get the rear turn signals to act as all three; running lights, turn signals, and brake lights... You need to add a run/turn/brake module. The module plugs inline between two connectors, the connector for the main harness that plugs into the connector for the rear lights harness. That connection is under the seat, cam plate side, back by the rear fender. That module varies the voltage to the single filament rear turn signal bulbs, to allow them to function like dual filament bulbs.
If your rear turn signals were functioning as run/turn/brake, and now one is only functioning as turn and brake, the wiring has an issue, or the R/T/B module has failed.
I would find that connection and remove any module (HD accessory or aftermarket) plugged in between the two connectors mentioned.
If the lights return to how they are supposed to function from the factory, then the module has failed, time for a new module.
If the lights still have an issue, then I would investigate the wires, connectors, bulbs, sockets, etc., that are aft of that connection for an issue (ie: shorted wire, broken wire, bad connection, etc).
Good luck and report to us what you find....