Really dumb tail light question [Archive] - Forum


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08-21-2008, 06:28 PM
I finally replaced all the bulbs in the back tail lights.

(3) of 3156
(2) of 3157

per side....

I noticed that the 3156s can install either way. They seem to work either way you install them.

Now, on the 3157 I removed them before looking at how they were installed.
I installed them and they seem to be proper, but for sanity - is it possible to install the 3157s backwards or are they keyed so they only go in one way??

I couldnt tell and they went in.

The last time I replaced a taillight that was like this, they were the round base that had 2 tips (one higher than the other) and could not be installed wrongly.


08-21-2008, 06:45 PM
You can't put it in backwards. You can't put the wrong bulb in either. There is a key tab that has to match or it won't snap into place.

08-21-2008, 06:56 PM
thanks. I appreciate the reply-