Rx330 Brake Lights

[Franco]

I have a RX330 and the bulb indicator lamp is lighted on the dashboard and the left brake light does indeed not work. The tail light on that side does work.

I opened up the housing and found the bulb but it appears to be a single filament bulb, which is not what I was expecting since it appears that the tail and brake lights are one bulb.

I have identified the bulb as a No. 168. I also notice that there is a printed circuit board contained within the light housing. Could it be that the brake light is controlled in some way by that circuit board? Or am I missing something fundamental in the light housing.

There are only two bulbs in the llight housing; the turn signal bulb (which is amber) and the tail/brake which is an oblong, clear bulb.

How do I diagnose and repair the left rear brake light on my vehicle?

Thanks to all.

[wendell]

I have a RX330 and the bulb indicator lamp is lighted on the dashboard and the left brake light does indeed not work.  The tail light on that side does work.

I opened up the housing and found the bulb but it appears to be a single filament bulb, which is not what I was expecting since it appears that the tail and brake lights are one bulb.

I have identified the bulb as a No. 168.  I also notice that there is a printed circuit board contained within the light housing.  Could it be that the brake light is controlled in some way by that circuit board?  Or am I missing something fundamental in the light housing. 

There are only two bulbs in the llight housing; the turn signal bulb (which is amber) and the tail/brake which is an oblong, clear bulb.

How do I diagnose and repair the left rear brake light on my vehicle?

Thanks to all.

←

You have to unscrew the rear break light panels . The screws are located on the side of the break light.(Pop open the trunk)

[jerryray]

I thought the RX330 used LED's for all the rear lights.

If not how many filament type bulbs are there?

[Franco]

I thought the RX330 used LED's for all the rear lights.

If not how many filament type bulbs are there?

←

There are two filament bulbs in the tail light housing. An amber turn signal and a clear bulb which I believe is the combo tail/brake light. They are the newer push-in type bulbs with the flat, glass base (as opposed to push & twist).

There is also a printed circuit board attached to the tail light housing. I am wondering if it controls the clear bulb, increasing the intensity when the brake is applied. What I have noticed recently is that the brak light sometimes does work. When it works sometimes it illuminates at the full intensity and sometimes at a diminished intensity. That is what makes me suspect the printed circuit board may be the culprit but I do not know how to test it.

Thank you for your feedback and in advance for any information you may have on this topic.

Franco