Without depressing the connector's clip, try pushing in (towards the center of the alternator). Then try pushing the clip and removing the connector.

Alternatively: Remove the bolts and nuts holding the thin steel cover on it (embossed with "ND" for Nippon Denso). Then I would take a screwdriver and see if I could pry a bit on a few edges while pressing the clip. Vacuum and/or dirt holds these plugs in place sometimes.

Youtube has several videos to help with the alternator. E.g. see

The hose looks like an A/C refrigerant line to me. But someone else who actually owns a V6 will nail this.

 

Elle_Rav4,

Thanks for these suggestions. I have read about people removing the nuts holding the steel cover in order to push out the connector but was always wary about doing that. Once my replacement alternator arrives, I will try that on the replacement to better understand what's behind this steel cover.

 

Whenever I remove a wire harness connector I use a small screwdriver as a pry bar to lever them apart while I hold the retaining clip in. The leverage makes all the difference.

In this case, it is a waterproof connector so there will be a sealing ring around its perimeter which the prying action is needed to overcome.

 

Ah I wasn't aware of the sealing ring on this waterproof connector. As for the screwdriver, do you mean one of those used for computer repairs will suffice?

 

Any small, "-" screwdriver will work so long as it is wide enough to not just cut into the resin, and strong enough to not just bend when used as a tiny lever like this.

I use the little one visible in this photo:

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Okay great that helps a lot!

 

That's an AC hose. No need to remove, that will cause you to have to evac and refill the AC. Patiently wiggle back and forth Maybe some grime is in the connector making it difficult to relase.
BTW: When my ALT went out I bought the $10 brush kit, took two minutes to replace the old brushes and all was good. Obviously if the bearings or other major issue with the ALT the kit won't help.

 

Okay thanks for letting me know.