Audio Systems: toyota radio, pin outs, wiring harnesses

Question
I have a Toyota radio Part number 86120-2b290, only has one plug on the rear , not two like most Toyotas, am I missing a component?

Answer
Probably not.  Every model, every year there are several different types of radios used. In the case of Toyota they use many suppliers to make the radios for them and the wiring harnesses change from year to year and model to model. So, if you know the make/model/year the radio came out of I can tell you.  But the part number means little at this time.

The number you gave, Toyota radio Part number 86120-2b290, seems to be a Fujitsu Ten part number.  They used to make lots of radios for Toyota. This particular one seems to go back many years so you will have trouble finding any support documents on it.

Here are the pin-outs for Toyota passenger cars - most of them, not all of them:

http://www.installdr.com/Harnesses/Toyota-Wiring.pdf

Hope this helps.