Outside LIghts

[rwess]

My travel trailer has two different switches for the door side outside lights. I have two switches inside, one is labeled OS (I assume for outside clear/white light), and one labeled porch (for outside amber light). On a recent trip I noticed that the amber outside light did not work, but has in the past.

I assumed that there were both a clear/white bulb and a separate amber bulb in he fixture. When I took the cover off the outside light there is only one bulb in there. Is this some type of a two color bulb with two separate switches operating different filaments? This has got me baffled.

[deltabravo]

Post a photo of the fixture and the innards of it.

[deltabravo]

It must be a LED lamp. An incandescent bulb can't change colors.

[bobndot]

3157 switchback led bulb ?

[DrPepper1010]

Are there any identifying marks on either the glass or the post??
How many terminals are on the bottom of the post?
Is the glass clear or amber?
Can you post a pic of the bulb?

[rwess]

I have two inside switches. When I turn one on the light is white and when I turn the other on the light is amber. The amber light has quit working. I opened up the outside expecting to find two separate bulbs one clear and one amber, however there is only one bulb in the light.

[DutchmenSport]

Not quiet sure what your describing? Do you have 2 outside lights, one white and one yellow.

Or

Do you have 1 light fixture and it changes from yellow to white?

My outside lights take the standard old style automotive bulbs, 1156, which is a single post bulb with one filament (used for running lights). The 1157 is a double element post. One filament is used for running lights, the other for turn signal and stop lights. The taller one is the turn signal-stop light.

However, if one light fixture fixture turns from white to yellow, I have no clue what that kind of bulb would be:

1157 (double filament)



1156 (single filament)



The 1156 also comes in Amber color too: