OK-
I'm trying to replace the factory bulbs with Sylvania XtraVision 9004 (HB1) bulbs for my 2004 Impreza WRX. I mistakenly got 9006 (HB4) capsules, but I figure I should have no problem exchanging them unopened. It looks like I'll have to remove the battery in order to pull out the left headlight. I tried pulling the right-side lamp, where there is a limited amount of room in front of the ABS pump.
I managed to unscrew the headlight mount cover which was easy enough. The next step was to remove the ground wire connector. My manual shows an arrow pointing the the end of the connector. I suppose this means I need to squeeze something that will release the connector, but I haven't figured it out yet. Am I supposed to squeeze at the end, middle, edges, push down, or what? If I can finally get it off, the retaining clip looks to be easy. There also seems to be a couple of screws, although the manual says nothing about removing those. Or do the screws hold on to the bulb in some way?
I'm starting to miss my '95 Integra GS-R. It used 9006 (HB4) capsules, and the connector simply clipped on at the base, and the assembly twisted off.