Problem with Lionel crossing signals

If a light stays on, it would seem to indicate that the insulating film on the underside of one of the two wings of the contactor has lost its mojo...is allowing the metal wing to contact the rail full time.  Or some conductive dirt accumulation has bridged that gap...perhaps?

In like manner...and assuming both bulbs are of equal voltage rating...if another bulb is 'weak' in its light in comparison, perhaps the wing itself is dirty...deposits left by the passing wheels.  The dirt acts like a resistor, so your bulb is not receiving the same voltage as its neighbor.

That's just an intuitive response from what you've indicated. 

IIWM, I'd take the signals and the 154C to the workbench and check it all out there, then reinstall after any cleaning/repairs.  

Let us know what you find to be the problem(s).

KD

I removed the lock-on and saw that the problem lies with the "wing" clip. Some of the insulation has worn away. I have some stuff I recently used to coat the ramp of my shed. It's called Bullyliner. It is a compound of pulverized old tires and stuff to keep it liquid and sticky. It works well at keeping my ramp from being slippery and is water resistant. I think it will be a good insulator for this application.  Anyway, I'm going to try it and I'll let you know how it works.

Thank you for your reply and input.

Okay, the signal lights are working again. The Bullyliner did a good job of insulating the wing clip from the power rail. I had to clean the three contacts to get a good connection from the track to the lights. Once again, thanks for the help.