HI folks,

I noticed that I have a burnt reverse lamp on the driver's side, so in looking in the manual to see what bulb number it is, I noticed that it has the same part number as the tail/stop bulbs.

Thinking this was a typo, I looked at the actual reverse bulb and noticed that it was indeed a dual-filament bulb.

My question is, what is the reason for having a dual filament bulb for the reverse light?

 

Maybe brighter when burning both filaments?

 

Actually, I think I know the answer for that. As I went to replace the bulb, I noticed that there are spots in the bulb holder where their should be metal prongs for the "dimmer" circuit empty.

In other words, the only metal prongs that are in the socket power on the bright circuit (filament). The other prongs for the dimmer light are not in the socket.

But I appreciate your input Weed.

 

Its nice though if you have a blown brake light you can switch it with the reverse light and it gets rid of the light out light in the dash.

 

Does having the brake light out illuminate the "lamp out" in the dash? I thought that was only for the headlights.

 

no...that lamp out indicator will come one for any bulb that has gone out on the exterior of your rig

 

Damn that's awesome! I keep learning more and more things I love about my truck!