Question: New light bulbs ?

[killain]

I'm in the proces of changing all the bulbs on the rear of my 2003, and I have to admit it's been awhile, but the taillight bulbs are now 3057 rather than the old 1157 and they now plug in. My question is how do you tell if their in right? On my car you can plug them in one way and then flip them around 180 degrees, Either way they go into the harness? Thanks ! :ugh

 

[Pegasus]

It doesn't matter which way you plug them in. They will work either way.

HTH

 

[jdeatsch]

The 1157 bulbs are not polarity dependent.

They ARE with offset pins so they will go in correctly. The filaments are different between brake/turn signal and tail light.

How does the 3057 know which filament is supposed to light up? Hmmmmmmm?

 

[Pegasus]

The 1157 bulbs are not polarity dependent.

They ARE with offset pins so they will go in correctly. The filaments are different between brake/turn signal and tail light.

How does the 3057 know which filament is supposed to light up? Hmmmmmmm?

1034s, 1157s, 2057s, etc (three versions of the same bulb - different candle powers) and are polarized bulbs as indicated by their offset pins. They will only fit (properly) one way. Those bulbs only have 3 electrical contacts (each filament shares a common ground).

The 3057s, 3157s, 4157s, etc, are different. They are not polarized bulbs and have 4 electrical contacts. Each filament has it's own 2 contacts on the base (wires) and will work correctly regardless of the way they are inserted into the socket.

See? Hmmmmmm?