I haven't posted in a while since the Red Rooster has been trouble free and running fine. I Lost left front fog lamp, ordered original replacement 55W bulbs, changed the left side, bulb was blown so I went ahead and replaced the right side as well with new bulb since they are 24 years old. Hey, it was really cool opening up the splash guard knowing it hasn't ever been violated. Well, anyway now the right side is out and will not work, replaced the new bulb with the original which was working fine prior to taking it out....and still no joy!!!! What give's, lamp is seated properly wires look fine and I have power to the lamp. No idiot lights on the check console, no blown fuses???? So please tell me what universe or dimension my 325is is currently operating in....... Any thoughts or suggestions??? Zdaneman is perplexed!
If the fuse isn't blown AND the power lead tests hot & @ proper voltage, then I'd guess you have a bad ground/ground wire, or, test the bulb contacts for continuity, or try them on the other side, although a ground issue would seem a lot more likely to me. Corrosion... ground lead broken, even internally within the insulation... something like that.
Unrelated, but something to keep in mind - a lot of the plastic clips & connectors are likely fragile due to aging now; only unplug what's necessary lest you find yourself making do with a crumbled clip/connector or having to replace it. Things like the connector on the brake fluid reservoir cap, expansion tank cap, windshield wash-fluid reservoir, horns, etc.