Okay you may help your friendly dealer to some cash in his attick, but in fact it doesn't have to cost any mony to cure this problem.
And for all people don't think you'll go look when flickering strats strik pre-emptively with you swiss army file
Make the connector look like this and its fixed no costs involved, don't forget the vaseline though, thats essential corrosion preventing agent spray them and your wiringlooms stand decades of saltsprayed Winters.
Or just ditch the plastic cover keeping the connectors from making sufficient contact, and just pinch the brass "B"'s a little after removing the allready manifested corrosional debris, so its a sound electrical fixture.
Actually there no need to cut wires or insulating without any plastic or crimpingtube, the cramepd connectors can shed their warmth more easy, but beware of changing lamps with the contact on though... >
The mentioned other connectors getting buggy after these bulb connectors have been fried in the first place is just logical, on the moment the lamp goes intermittendly on-off it causes spikes of current toasting the connectors downstream, just take your gardenhose, and fold it while spraying yur garden, if the connector at the fawcet isn't sturdy it will just pop off on the spike you induce by verry suddenly stop the flow of water... Electrons are flowing through the wires (not) quite like watermolecules.
Very often it blows small wattage lamps when a ground terminal of your exosed backlight holder of the original XT500 corrodes away, kept me searching quite a while in 1979, why my rear lights kept popping within a month...
So strike pre-emptively with a file to prevent upstream broiling...
P.S. if you live near the sea, de salty Ocean Eleven spray is as agressive btw.