Dim Signal Bulb 2001 Lincoln Town Car Signature

headlight ground

Left turn signal is dim, replacing bulb doesn’t work, using contact cleaner on any part of wiring or bulb connections or plugs hasn’t worked. any idea what the problem could be or the cost? its just the one bulb in the whole assembly that is dim and replacing of bulb does nothing.





You have tried some of the first steps when diagnosing a dim bulb. The next step would be to clean the ground connection for the bulb. This is the most common cause for a dim bulb. I am not talking about the ground connection in the bulb socket. I am referring to the ground from the wiring harness connecting to the frame/body.

“Simply clean the ground connection to restore the brightness of dim headlights. And apply a little dielectric grease. Or replace the bulb if you see a gray/brown film on the inside of the glass.”

Source: Family Handy Man