Monday, April 8, 2013

X300 Re-mounting Third Brake light

The brake light that sits at the bottom of the rear windscreen was sagging on one side, so I decided to get out there and fix it. The following is a (mostly pictorial) step-by-step guide to fixing it.

This first photo shows the outer housing and the bulb housing:

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This photo shows the two housings from the rear view. The mounting tabs are adhered to the rear windscreen. The black bulb housing slides down onto these mounting tabs, then "snap" into place. To remove the black housing, push down at the bottom, then slide up. Finally, the outer (white) housing slides over the black bulb housing, and snaps into place:

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This is the template that will be used as a guide to ensure the mounting tabs are secured to the rear windscreen in their proper location. The paper template I made is 2" high and wide enough so that the upper "wings" are above the mounting tabs.

I would give dimensions, but it's possible each car is slightly different. The idea is to ensure the mounting tabs are at the proper (90*) angle so that the black bulb housing will slide down onto the mounting tabs. I slid the mounting tabs into place in the black housing, then measured the distance between the inner edges of each mounting tab. Be sure the mounting tabs are *centered* within the slots of the black bulb housing ... this will ensure there is some "play" when you eventually slide the black housing onto the newly epoxied mounting tabs.

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 In this photo, I am "testing" the template to be sure that the alignment of the cuts are at proper right angles for the mounting tabs. When you slide the mounting tabs into the black bulb housing, be sure to "center" the mounting tabs in their slots - this will eventually allow for some "side play" when you slide the black bulb housing onto the mounting tabs.








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 Prior to removing the complete stop light housing, I made a mental note how the housing was mounted in relation to the windscreen's black masking. For my vehicle, the very top edge of the mounting tabs are 5/8" down from the top edge of the black masking.

For my car, the very top edge of the white outer housing rests just parallel with the upper edge of the black masking.

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Here I have taped the template into place ... I have a line marked on the template for its center-line ... and I've marked the center-line of the windscreen's black masking with a piece of black electrical tape.

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I've epoxied each one of the mounting tabs into their respective "slots" at each edge of the template. I used 5-minute clear epoxy ... I mixed the epoxy in-car, because of the high heat and humidity .... I mixed, then applied to the surface of the mounting tab, then placed it into the respective corner of the template and held in place for 5 minutes ...

Please !!! Do each one ONE AT A TIME

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 I waited 15 minutes, then CLEANED the windscreen around the areas of the housing, both inside and out. PLEASE ... clean the glass before re-mounting the black bulb housing and the outer cover housing. Simply slide the black bulb housing down onto the mounting tabs, then hook up the wiring, then side the outer cover over the black housing.

For me, a vodka/grapefruit was in order

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 A view from the rear ... sorry about the reflection of the trees in the rear windscreen.

THE END .... enjoy!!

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