I have a 92 4runner built in japan for the canadian market. I have no sound from any speakers. I'm going original because this truck is mint with only 25k miles. Found a replacement amp model #86280-35020. I checked fitment on a couple parts websites and it's supposed to fit mine but not a north American built truck. I've checked manufacture date and option codes and its supposed to be there somewhere. took center dash apart and there is no amp behind ashtray. The radio is a Toyota model 56403. My question is, does this radio/cassette player need an amp and could it be a unit with independent rear amps? If so then the head unit is done.

 

It's been a long while, but I don't recall that unit having an external amp.
The pocket below could be removed if the owner wanted to add the accessory CD player. The radios that required an external amp usually had all that incorporated into a 2-din unit.
If you pull the unit out the harness that plugs into the radio would be the tip off.
can you post the model number off the vin plate?

 

Thanks for the reply. I'm attaching a picture with radio and it includes the production date and option code. The wiring harness came with the used amp I bought and it fits the back of radio as well. 2 din means 4" deep stereo...right? This one is 2 inches deep. When I search the option code, I can access diagrams that show this exact radio and it shows the same amp as a part of the system.

 

And from what I can figure.....fitment confirms the Japanese built unit has this amp and not the N American built trucks.

 

Here is what I have found when I run the option code and this parts catalogue shows both parts in the same diagram.

 

Well I have nothing to add but a request for pics of this 25k mile mint rig you speak of!!!!

 

The amp is the only thing that doesn't work. It has to be there somewhere!! I've detailed the truck inside and out and underneath. It's near flawless and still smells new inside. Guy bought it new and died at 92 years old and became part of his estate.

 

Ooooooo it looks absolutely wonderful!!!!

 

The amp in my 89 Supra is under the passenger seat. You've probably looked there already...

 

I have a 95 and mine didn't come with it. Also had an aftermarket radio. I found the correct radio and amp. It bolts behind the head unit. Down low close to the floor. I didn't think to take any pictures. I remember finding a couple online that told me orientation.

Jake

 

The wiring harness you show with the 86120-33080 radio, are the coming directly out of the radio, or do they plug into the back.?

 

The harness you see with the blue ends actually came with the amp but do plug into back of radio as well. Its chopped off short. The radio plugs goes from radio directly into the harness behind it. The amp wiring must have come out of harness closer to mounting location. The white harness on amp must go to speakers.

 

The harness you see with the blue ends actually came with the amp but do plug into back of radio as well. Its chopped off short. The radio plugs goes from radio directly into the harness behind it. The amp wiring must have come out of harness closer to mounting location. The white harness on amp must go to speakers.

 

Toyota amps usually plugged into the back of the radio. If you look up the cowl wiring harness for your 4Runner it'll have a dozen different ones depending on a few options(power windows, cruise, etc) but none mention with/without amp

A standard setup for a Toyota radio was two spots to plug in the harness. A bigger one that had power, ground, memory, illumination, etc etc.
The second plug had a few less wires and was for front/rear speakers.
If an amp was required than there would be a third slot to plug the amp into the radio/tuner.
That radio (56403) is a pretty basic unit, I'd be surprised if an amp was required

The screen shot from amayama just shows where the components would be if it was equipped from those components. Don't use that as confirmation as how your vehicle was built.

 

My '94 came with a radio/tape player that looks exactly like yours, has the same Model and Ref no., and did not come with a separate amp. Mine has a pair of recessed male connectors that look very similar to the connectors you have on the end of pig-tails. (Or is that the "wiring harness," so that you have the standard recessed connectors?) (Mine are 10 and 6 pin.) The 6 pin connector is for the rear speakers, the 10 pin connector is for the front speakers, power, antenna, lighting, etc.

This reference: https://web.archive.org/web/20120617...11audiosys.pdf shows simplified wiring for a Radio-Tape player with a separate power amp. Note that that radio has a single 15-pin connector. I can't see your amplifier connector, but if it's a 15 pin connector it probably is for a different radio-tape player.

Based on all of the above, I don't think your radio-tape player had a power amp. You should be able to hook up some power and a pair of 4-ohm speakers and listen to music.

You did say "If so then the head unit is done." I don't know what you are referring to. But amplifier or no, the first thing you should do is test the radio-tape player for function.

 

Thought all 4runners were built in Japan.
Never seen one with that amp anywhere in it. The 3rd gen 4runner had an optional amp in some models but it was pretty worthless power wise though and modern head units have more wattage.

 

Back then, amps were pretty rare in any Toyota. Supras and Cressida mostly.

 

So I know you want to keep it stock but that doesn’t mean you can’t put something retro looking in it, save the old Stereo OR I believe you can find a repair shop, might be some research but they do still exist.

Blaupunkt makes an amazing looking single din deck, it’s not cheap but if I had something I was going to keep but don’t want to change much I would buy one in a heartbeat

And you can’t post pics of this gem without some interior shots!!!!

 

OK. I really appreciate the feedback from everyone!! So...being in my 60s I had to confirm how much sound I was getting. I said no sound....that must have been while I was driving it . With the tires and road noise I could hardly hear it. This was last summer. I just plugged it back in and not running in garage I have sound, not enough and the loud button does nothing. The volume would be 1 or less on a dial to 10. This is why I thought it was an amp issue and went investigating on line for answers. It appeared like it was born with that amp when checking part # for fitment.

jimkola.......I didnt necessarily use the amayama part diagram to determine where it was located. To me it seemed to confirm that particular radio needed an amp.

The link scope103 sent helped me understand the wiring. I will post pic of what I have. The white harness/plug is the 15 wire that would go to radio. The 2 blue ones in pic are exactly like the plugs from my harness that plug into my radio, including the small single wire plug that wasn't plugged into anything.

So with all the helpful info ......it looks like that amp does not belong in this truck. But .....I still have a 4runner with insufficient sound. Can I assume the radio has issues? Anyone have an opinion? For now I want to go original. I have seen that basic radio for sale. It was installed in many types of toyotas.

If the amp fit in behind the ashtray I could install a single din toyota radio if it had a 15 pin plug.

 

https://bringatrailer.com/listing/19...ta-4runner-19/

This is my truck on BAT. It didn't meet reserve. Guy on Vancouver Island bought it in 92 and owned it for 30 years until he died at 92 years old. Garage kept and by looking at the inside...he never had a passenger. Still smells new. The only thing not original was the tires. Absolutely everything else was original. I've refreshed stuff and detailed it inside, outside and underneath.