Ford Galaxy Ghia 2005. Rear left hand brake light had blown. Fine. Took it out while rear running (rear “headlight”) lights were on, the brake light bulb is a double filament which is also the running light. As I was taking out the assembly the rear running light went out. The new bulb is in, it works as a brake light… But the rear running light does not come on. Swapped the new bulb with the same bulb from the right hand side, it works on the right but the bulb from the right does not work as a running light on the left. Not sure what to do about this, cursing for taking it out while it is on.
Could the computer have disabled the bulb to prevent a short or something like that?
I’ve read something to that effect but how to remedy such a thing if true.