I've been becoming more and more frustrated with the distinctly low-end aftermarket stereo in my car, and decided finally to replace it. Picked out a nice Kenwood, ordered it and what they were certain was the right harness adaptor from Crutchfield. It took a week to get the package, and when I had it I went out, looked, and from the view I had through the slot in the dashboard, it all looked good to go. So I pulled out the wire strippers, and the crimper, and with a merry chorus of clicking noises I connected up the wiring harness adaptor. That done, I decided to just install the new stereo and be done with it.
So I pulled out the old one, pulled on the wires, and... wait a moment. That's the wrong plug. There's no second plug. This is the wrong harness adaptor. So, now I'm out $15 because their website was wrong. There'd been a review mentioning that this might not be the right adaptor for a 1994, but I'd trusted them.
Turns out, the reviewer was right. I needed the other adaptor, which the website didn't even show me until I searched by the part number he'd given, and which the website insists won't fit my car. Sorry, website, but I'm rather more inclined to trust the actual wires and plugs under my dashboard.
So now, I have two options. I can either whomp up another set of splices in the wiring I have, or I can telephone the people who sold me the stereo, and explain to them that their website steered me wrong, and I need the other harness adaptor. It turns out, you see, that which harness adaptor is needed depends on which of the two options for a factory stereo Volvo installed, and I didn't know which stereo my car had had since it was long gone when I bought it. I'm definitely inclined to telephone them and say that they really ought to have both options shown, since their unwarranted certainty caused me issues.
In the meantime, I shall continue with the declining stereo that's fitted. It mostly works.