new head unit = rear speakers no sound

gohawks · 01-29-2006, 07:47 AM

Hey all,

I just installed a "new" kenwood head unit I bought from a member. Installation went great, except I realize the rear speakers aren't working.

I THINK i read here at one time that these rear speakers have their own amp and something.....something....something...I don't remember exactly what was said, just that it could be a problem when putting a new head unit in.

It is a 1st Gen 4runner and had the "premium" stereo in it as stock.

Any help or suggestions?

BTW my stock deck must have been on its last leg, because it sounds so much better w/just the front speakers then it did before.

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Icehawk · 01-29-2006, 08:19 AM

Jay gave me call and I will walk tell you what need to be done. I need to know what wire are where.

gohawks · 01-29-2006, 09:40 AM

Patrick,

PM me your number again and I'll give you a call.

I have the same problem I have read about in other threads, but can't figure out exactly what to do.

I have sound to all four speakers with the radio on, but with the CD player only the front, something to do with the antenna? speaker amps in the back?

I have one wire on the kenwood harness that doesn't have anywhere to connect it. It is blue and white, and says "P control" there isn't another wire on the Car harness to attach it to.

Thanks
Jay

ato178028 · 01-29-2006, 05:11 PM

That wire is for an externat amp, it is for the remote to turn the amp on when the stereo turns on. Did you use the amp in the car already. When I installed my head unit I took out the amp. I used a harness from walmart and everything works fine

gohawks · 01-29-2006, 07:39 PM

http://www.yotatech.com/showthread.p...+sound+antenna

http://www.yotatech.com/showthread.p...+sound+antenna

well at least I'm not crazy and others have had the same problem, lol

sigh...guess I'll keep fooling around with the blue and white wires tomorrow and see what happens.

See if I'm going in the right direction here.
I have 2 blue and white wires coming from the Kenwood harness.

1) Power Control/Motor antenna control wire (blue and white) . I have this connected to the car harness.
2) Power control wire (blue and white). This is not not hooked up to the car harness.

So if I'm following correctly I need to disconnect #1 from the car harness and connect #2 to the car harness.

Am I correct??!?!?!?

runethechamp · 01-30-2006, 08:11 AM

Yes, the car harness goes to both the amps and the antenna. If you use the antenna wire from the stereo, the amps only turn on with the radio on. I had the same problem myself.

Bumpin' Yota · 01-30-2006, 12:03 PM

Quote:

Originally Posted by gohawks

Patrick,

PM me your number again and I'll give you a call.

I have the same problem I have read about in other threads, but can't figure out exactly what to do.

I have sound to all four speakers with the radio on, but with the CD player only the front, something to do with the antenna? speaker amps in the back?

I have one wire on the kenwood harness that doesn't have anywhere to connect it. It is blue and white, and says "P control" there isn't another wire on the Car harness to attach it to.

Thanks
Jay

Hehehe

EZ FIX!

Blue - is your power antenna lead (only carries 12v when the radio is on and is typically used to raise the mast on a motorized antenna, when you hit 'CD' the voltage drops to zero)

Blue/white - is your amplifier turn on wire (always carries 12v when the deck is powered up

You have the blue wire from the deck hooked up to the amplifier's turn on wire. Hook the blue/white wire up where you currently have the blue hooked up.

gohawks · 01-30-2006, 01:08 PM

Thanks guys, I switch around here in an hour or so and report back...

gohawks · 01-30-2006, 05:35 PM

Yup, that was the problem. All better now....now just have to wait for shipment of my 4 new speakers...2 pioneer 4 inch and 2 pioneer 5.25

Thanks a bunch everyone...again yotatech proves to be easily the best $10 I ever spent on my 4Runner.

dutch1505 · 11-04-2009, 03:21 PM

have 91 4x4 ext cab truck, just replaced head unit and had same prob. thanks for all the help, had no idea rear speakers had factory amps on them until i read this, then it all made sense. new head had no blue remote(power to amp)wire for some reason, guess cuz its a cheap sony and had no sub-outs on it so they figured there wouldn't be an amp involved, but had power antenna wire(blue and white) so rear speakers only worked when listening to radio not cd. if this is your dilemma, maybe this will help.... i took the blue remote(amp) wire on the wiring harness, and spliced it with the 2 red power wires. they are all rated at 12v so... that way whenever the head unit is on the rear speakers get power and work this worked for me, hope it will help

jwoyshnar · 11-08-2009, 11:30 AM

Anyone know where the amp is located? Also if i bought a harness kit from wally world would this work with the factory amp? If not could you direct me to a harness i can use.
Thanks

01-29-2006, 08:19 AM	#2 (permalink)
Icehawk Registered User Join Date: Jul 2005 Location: Arligton, WA Posts: 120	Jay gave me call and I will walk tell you what need to be done. I need to know what wire are where. __________________ If freedom is free, then why pay in blood http://www.cardomain.com/ride/2213905

01-29-2006, 09:40 AM	#3 (permalink)
gohawks Contributing Member Join Date: Jan 2005 Posts: 1,274	Patrick, PM me your number again and I'll give you a call. I have the same problem I have read about in other threads, but can't figure out exactly what to do. I have sound to all four speakers with the radio on, but with the CD player only the front, something to do with the antenna? speaker amps in the back? I have one wire on the kenwood harness that doesn't have anywhere to connect it. It is blue and white, and says "P control" there isn't another wire on the Car harness to attach it to. Thanks Jay __________________ SERENITY NOW!!

01-29-2006, 07:39 PM	#5 (permalink)
gohawks Contributing Member Join Date: Jan 2005 Posts: 1,274	http://www.yotatech.com/showthread.p...+sound+antenna http://www.yotatech.com/showthread.p...+sound+antenna well at least I'm not crazy and others have had the same problem, lol sigh...guess I'll keep fooling around with the blue and white wires tomorrow and see what happens. See if I'm going in the right direction here. I have 2 blue and white wires coming from the Kenwood harness. 1) Power Control/Motor antenna control wire (blue and white) . I have this connected to the car harness. 2) Power control wire (blue and white). This is not not hooked up to the car harness. So if I'm following correctly I need to disconnect #1 from the car harness and connect #2 to the car harness. Am I correct??!?!?!? __________________ SERENITY NOW!! Last edited by gohawks; 01-29-2006 at 07:48 PM.

01-30-2006, 08:11 AM	#6 (permalink)
runethechamp Registered User Join Date: Oct 2005 Location: Berkeley, CA Posts: 586	Yes, the car harness goes to both the amps and the antenna. If you use the antenna wire from the stereo, the amps only turn on with the radio on. I had the same problem myself. __________________ 94 4runner SR5, V6 3VZE, 5 speed Completely rebuilt engine with Toyota parts at 147k miles Downey Coils, Aisin manual hubs, Cowl Louver mod, Hella 500 fog lights Yeah, I know, not many cool mods here

01-30-2006, 01:08 PM	#8 (permalink)
gohawks Contributing Member Join Date: Jan 2005 Posts: 1,274	Thanks guys, I switch around here in an hour or so and report back... __________________ SERENITY NOW!!

01-29-2006, 05:11 PM	#4 (permalink)
ato178028 Registered User Join Date: Dec 2005 Posts: 51	That wire is for an externat amp, it is for the remote to turn the amp on when the stereo turns on. Did you use the amp in the car already. When I installed my head unit I took out the amp. I used a harness from walmart and everything works fine

01-30-2006, 05:35 PM	#9 (permalink)
gohawks Contributing Member Join Date: Jan 2005 Posts: 1,274	Yup, that was the problem. All better now....now just have to wait for shipment of my 4 new speakers...2 pioneer 4 inch and 2 pioneer 5.25 Thanks a bunch everyone...again yotatech proves to be easily the best $10 I ever spent on my 4Runner. __________________ SERENITY NOW!!

11-04-2009, 03:21 PM	#10 (permalink)
dutch1505 Registered User Join Date: Nov 2009 Location: greer sc Posts: 2	have 91 4x4 ext cab truck, just replaced head unit and had same prob. thanks for all the help, had no idea rear speakers had factory amps on them until i read this, then it all made sense. new head had no blue remote(power to amp)wire for some reason, guess cuz its a cheap sony and had no sub-outs on it so they figured there wouldn't be an amp involved, but had power antenna wire(blue and white) so rear speakers only worked when listening to radio not cd. if this is your dilemma, maybe this will help.... i took the blue remote(amp) wire on the wiring harness, and spliced it with the 2 red power wires. they are all rated at 12v so... that way whenever the head unit is on the rear speakers get power and work this worked for me, hope it will help

11-08-2009, 11:30 AM	#11 (permalink)
jwoyshnar Registered User Join Date: Oct 2009 Posts: 12	Anyone know where the amp is located? Also if i bought a harness kit from wally world would this work with the factory amp? If not could you direct me to a harness i can use. Thanks

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