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4th Brake Light?

I took my rear bumper off for another reason, but when doing so I looked at my dummy 4th brake light. There is a harness going to it with a

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Old 09-06-2020, 02:35 PM   #1 (permalink)
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I took my rear bumper off for another reason, but when doing so I looked at my dummy 4th brake light. There is a harness going to it with a plug on the end. It plugs into the 4th brake light housing but the plug on the housing goes nowhere. It looks like it's basically a holder for the plug. Is my 2010 Roadster pre-wired for a 4th brake light and can I just purchase the light and plug it in?
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Old 09-06-2020, 02:49 PM   #2 (permalink)
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The harness is for a fog light (which is the proper description for what you call a 4th break light). The wiring goes to a button on the interior which is used to turn on the fog light during a fog. This button (and a functioning fog light) is only found on Canadian, JDM and I believe European and Australian models (they maybe a few others). Not on US models.


Many people choose to use the fog light spot as a third brake light by not using the harness and wiring to the brakes. You can do the same.


The third brake light can be purchased from EVO-R or JDM toys.


You can also choose to wire an OEM fog light and fog light button, if so desires, by using the existing harness.
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Old 09-06-2020, 03:02 PM   #3 (permalink)
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Thank You
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Old 09-06-2020, 03:17 PM   #4 (permalink)
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iJDMTOY LED 4th Brake Light


4th Brake light


wiring rear fog light as brake light


4th brake light


iJDMTOY Rear Fog Light install...


Tail Light Strobe Mod


Evo-R fog light
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Old 09-06-2020, 04:26 PM   #5 (permalink)
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Thanks, I'm going to go with the iJDMTOY Rear Fog Light kit from Amazon. Which one do you think I should go with, the red/clear or red/dark? I do not want the smoked.

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