LJ78 Stereo

[Gene45]

I am replacing the factory stereo in my 90 LJ78 and am having trouble sorting out the wires to the speakers.

The vehicle had three plugs on the wiring harness, only one of which was used. None fit the new stereo. I cut off the plug that was used and planned to wire the new plug that came with the stereo to the old wire stubs.

I have an old ghetto blaster with detachable speakers, and connected one pair of wires to one speaker line to test for which wires to which speaker . I get no results. i.e no connections, but they worked before I started.

Does anyone have a wiring diagram or a procedure to sort this out .

 

[yotahed]

I did a stereo install in my LJ with an amp and a sub. i ran all new speaker wires to all the speakers. you should do this anyway. the stock wire is too small to handle any decent speakers. I ran power to the back under the carpet and in the side panels. If you do this youll be far happier with the sound quality than with the crappy stock wiring... i also ran big power wire for the amp and deck right from the battery which you should also do. yoou can pick up a decent wire kit from crappy tire or best buy for under 50 bux. well worth. my .02 ¢

 

[GTSSportCoupe]

Do what yotahed said if you want a decent stereo. If you don't have the time though, just pull the factory speakers out and look at the wire colors. Make notes of the colors and speaker location, and hook up accordingly to your new deck. 12V and ACC are easy too if you just use a multimeter with the common probe to ground. Poke the other probe in the plugs with your key off to find 12V. Turn the key to ACC and poke again to find ACC (12V)

Good luck.

 

[Gene45]

This may sound unbelievable to some of you, but the only speaker I can find is in the right rear door and it is in bad shape.
If I am going to string new wires I will have to replace the speakers also with a completely different style.

I used surface mount ones many years ago. Not sure where to find such things now.

 

[yotahed]

I didnt even end up hooking up that rear door speaker. i think it was the 'sub'. mine was ripped all around the edges. the other two are pretty visible in the back inside panels. just pop the panel off carefully. unless some models didnt come with thos?? the front two are under the dash almost looks like a vent. On the drivers side you have to get it from the back of the dash as its not accessable from the outside. the one by the glove box can be changed by taking the glovebox out (6or7 screws) and reaching in. or maybe u can get that one from the outside cant remember. somebody put alpines in mine before i got it. so i didnt bother changing them just ran new wires

 

[Gene45]

Thanks, I numbered all the existing wires and tested every combination of all that had no voltage on them with the acc switch "on".

No connections anywhere, so it is "string new wires".

The drivers side speaker can be accessed by removing the four screws at the bottom of the instrument panel, so the cover can be raised enough to access the speaker connections.

This unit had a TV at one time with the antennae at the back. I cut the wires when I removed it so it is only now question of "can I find them".

I'll get it done immediately, no matter how long it takes.

 

[kzj78]

I fully rewired my KZ as well. There are two amps behind the panel on the left rear side ... just in front of the jack. Dont know how many harness changes there were in the way but after getting frustrated for hours and having help from a professional installer we just rewired.

 

[GTSSportCoupe]

No connections anywhere, so it is "string new wires".

That is strange. Out of curiosity, what trim level is your LJ78? Is it a base model? LX5? SX5? Maybe it never came with a multi-speaker stereo from factory.

 

[Gene45]

Says Prado EX5 on the back door.

I'm sure that stereo was a factory job. The wiring harness is all neatly taped and included three different plugs apparently for different grades of stereo.

This one was AM\FM with Japanese increments and ranges, it had a tape deck and CD, neither of which handled their job very well after 23 years.

Japanese AM runs in increments of 9 rather than 10 like north America, so tuning is a bit odd, and the FM range is almost useless here.