I keep getting a lamp out light and chime while going down the road. It comes on and goes off repeatedly and is annoying as he double hockeysticks!!! The bulbs are fine. What else can I check? Is there a way to check inside the gray housing the bulbs are in? Thanks in advance!

 

Make sure you check not only the parking lamps but turns and brake lights also. If all that looks good then check the rear circuit boards in the tail lights for corrosion or melting

 

You could have a bulb going bad. I had this issue happen with my snowplow lights and about 2 weeks later both my high beam bulbs burned out.

 

its a pre warning that a bulb is going out, either change them all or wait til it goes out. Mine was on for a week before my bulb burned out.

 

Mine was doing the same thing and I checked all bulbs on my 03 Ram, so I got under the truck at the back and worked my way to the front it was not long till I found a bad wire that was grounding it self to the fram every once in a while.
Hope this helps.

 

How do I check the circuit boards? What is the trick to separating the plastic case? Thanks guys!

 

Just visually inspect them where the bulbs plug in at. Usually they are corroded or melted.