Hello everybody!
I'm quite new to Lexus family, but anyway...

It seems that there is some problem in wiring or amp that my passenger door speaker and tweeter doesn't work!
I already took off door card and checked both speakers with multimeter!
Mid speaker shows 6ohm and tweeter shower a lot more as it supposed to be! That's why i think they are in working condition! and all wires in speaker box seems good, because multimeter beeps on both wires!

I just can't figure out where goes both wires from doors? one is light green and other one was light blue if I'm not mistaking! I found light green on the amp and it's connected and no corrosion!
But where is that other wire?

And where to look for malfunctions? Really getting annoyed that I can't figure this out!

Oh and no I don't have any wiring diagrams for my car or even some cheap manual, because I can't find a place where to download it for free...

Please help if you can

 

Sounds like there is some unwanted resistance somewhere. Double check the wiring..there could be a small open somewhere.

 

Hmm... No voltage in plug and total silence could be from some resistance?
Ok, I can trace one wire, but the other one is total mystery for me where it goes...

I know that one of those 2 wires doesn't end up in amp or head unit! Well at least in the same color or thickness!

EDIT: Oh by the way! I have 1993 SC400 if year changes anything!

 

If there is no voltage even making it to the plug, it sounds to me like an open. remember, resistance causes voltage to drop. Try to trace the ground, it may be loose or open which can cause the circuit to be incomplete

 

Yeah I was thinking about the same, to trace gorund first, because it's most likely to be faulty not the amp!
Hopefully wont have take the dash off

 

DAMN those wires

All I could find out today, that no one of those two wires are connected to amp (no beep between two ends)
And wires between speaker and first plug that is in footwell are ok, multimeter beeps and resistance ~5ohm's as it should be!

But I couldn't get any further due to the fact that the other end of the plug is somewhere between footwell and outside! and I couldn't get the black cover off! I even took glovebox and airbag off, and even then I couldn't see anything more... Oh and carpet was removed a bit too...

I'm really getting annoyed, even tho I really like my car