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  #1  
Old 12th May 2019
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Default '90 XLH-1157 Bulb not working correctly-Left Front

Ign key to on: all lights lite up (run position).

-Left front is my issue. the 1175 bulb filament at the on/run position is on (the smaller/shorter element in the bulb).

-When I depress the left turn signal, the front left (1157) turn signal goes out. So it is lit, then goes out and that is the blinking mode for that front left signal.

-I pulled the connector apart in the headlight bucket and the front RIGHT works like it should.
-The front LEFT does not. It blinks as stated above, lit on the smaller element, then goes out/blinking mode.

-POwner said they had a problem (yrs ago, can't remember) and someone did some work-hence the wrong config or on the left front I guess. Replacing the lights w/LED's and want to get this fixed first. I just dealt w/it for now since it did light and,,,,,,

Note: Run position and (turn signal button depressed).
Front right works correctly.
Back right rear correctly.
Back left rear works correctly.
Stop/run works correctly.

Not sure what to do at this point, and I can't find my book.
Thanks,
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Old 12th May 2019
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Here's the Sportsterpedia section on Turn Signals - Specifically wiring:
http://sportsterpedia.com/doku.php/t...ring_-_general

Look at the bulbs shown - Be sure you rightly identify the BRIGHT element and the DIM element - Then confirm which is lit on your left front TS when the keyswitch is on with the turn signal switch off.... The proper element is the DIM element for Running Lights...

Be sure the BLUE wire is powering the DIM element for the Running Light - When the turn signal is supposed to be flashing, the BRIGHT element is to be powered on that side (both front & rear) by the incoming VIOLET wire...

Grounding on the '86-'93 bikes is done thru the frame - so be sure you have the ground strap from the handlebars (near the neck)... The turn signal housings are used for grounding, thru the handlebars, thru the frame to the battery negative...


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  #3  
Old 12th May 2019
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Quote:
Originally Posted by IXL2Relax View Post
Here's the Sportsterpedia section on Turn Signals - Specifically wiring:
http://sportsterpedia.com/doku.php/t...ring_-_general

Look at the bulbs shown - Be sure you rightly identify the BRIGHT element and the DIM element - Then confirm which is lit on your left front TS when the keyswitch is on with the turn signal switch off.... The proper element is the DIM element for Running Lights...

Be sure the BLUE wire is powering the DIM element for the Running Light - When the turn signal is supposed to be flashing, the BRIGHT element is to be powered on that side (both front & rear) by the incoming VIOLET wire...

Grounding on the '86-'93 bikes is done thru the frame - so be sure you have the ground strap from the handlebars (near the neck)... The turn signal housings are used for grounding, thru the handlebars, thru the frame to the battery negative...
Ok thanks, I'll check it out and verify.
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Old 17th May 2019
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Question, is it possible to split the circuit (Left/Right) and use a LED flasher one for each side?
I want to put LED's on and maybe I can isolate the problem if I can split the circuit and see which way to go/look.
Thanks,



http://sportsterpedia.com/doku.php/t...ring_-_general
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Old 19th May 2019
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Quote:
Look at the bulbs shown - Be sure you rightly identify the BRIGHT element and the DIM element - Then confirm which is lit on your left front TS when the keyswitch is on with the turn signal switch off.... The proper element is the DIM element for Running Lights...
Did you verify which element is lit for the running light? The wiring may be wrong...

Badlands has a unit that replaces the stock TSM with one that will drive LEDs:
http://staging.namzcustomcycleproduc.../04/ATS-03.pdf


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Old 20th May 2019
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is the bulb in correctly? should have a long and short key and i have seen the bulbs forced in wrong so the contacts do not line up. this issue can crop up also if the micarta terminal board in the back of the bulb rotated out of position.
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Old 4 Weeks Ago
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Yes the bulb is in correctly and I did notice the socket is somewhat rusted.

Yes the DIM filament is on/run position, it just goes completely out when you select the turn signal to make it flash.
I'll have to check further and see what's going on if I can't get it corrected.

Thanks,
P.S. I have a Badlands I bought two yrs ago, never hooked up and to late to send back. I'm not going to use it.
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Old 4 Weeks Ago
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The BRIGHT flashing light circuit comes in on a different wire altogether. It does not just "boost" the power to the DIM filament. There are two filaments in that bulb. The DIM filament should stay lit even when you press the turn signal to send power to the BRIGHT filament.

Perhaps some short developed in the bulb socket? Not unheard of in my experience.

The right rear socket (1157 bulb) on my old VW bus used to fail unexpectedly and repeatedly, but only the on the rear right near the battery. I assumed the battery gases may have had something to do with it, will never know. I had to replace that one rear taillight assembly several times over the 20 years I owned it. It would just start to cross circuit and no matter what I tried, I could never fix them. Took them apart and cleaned the shit out of everything.

John
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Old 4 Weeks Ago
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Thanks. Ghost light.
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