The whole left side is out

timisu87 · Post by **timisu87** » Mon Dec 03, 2007 2:54 pm

The speakers on my entire left side emits no audio signal at all. I thought it was the speakers at first since they were the original stock ones from 1992. But after I installed them, it was still dead silent. The right side of the car works great.

What could be the problem guys? Should I disattach the stock radio and see whats going on back there?

Post by **Wakeup** » Mon Dec 03, 2007 2:56 pm

Can you give us some ideas as to what your install consists of?
If you have an Amp, you might try switching your channels up and see if one of the channels is blown on the amp...or deck....
make sure the wires are intact.....

1moreamp · Post by **1moreamp** » Mon Dec 03, 2007 3:12 pm

Yeah I need more info, like what amps, and HU and sig processors in the loop ????????

timisu87 · Post by **timisu87** » Mon Dec 03, 2007 3:13 pm

No amp, and stock headunit.

Post by **Wakeup** » Mon Dec 03, 2007 3:34 pm

Could be a blown channel on the deck...
if you changed out the speakers, then most likely wiring or deck.

Post by **Bfowler** » Mon Dec 03, 2007 3:59 pm

Did you check the balance

timisu87 · Post by **timisu87** » Mon Dec 03, 2007 5:18 pm

Tried the balance thing. The deck thing only makes sense.

Post by **Wakeup** » Mon Dec 03, 2007 5:59 pm

if you can switch your left and your right's....you can see if it is a wiring issue or a deck issue..

So in other words, the line out for your LEft speakers switch it with your right....and your right line out switch it to your left in. etc.... see what happens....
If you get audio on your left speakers using your right channel...then.....your cabling is good...but your deck output is bad....etc...

1moreamp · Post by **1moreamp** » Mon Dec 03, 2007 6:42 pm

Stock HU ??? Is it Bose ?? Which Stock HU, which car company Who made the car or the HU???

Most cars have separate power amps nowadays, could be as simple as a inline fuse , or as serious as a bad D to A unit in the amp module or as simple as a broken cable or connector.

Your still not giving enough info on what you have both car and level of radio and such...

If you can't answer these questions I pose them your stuck with OEM dealer support for your stock system < Your best bet... I know a Company here in NorCal that repairs all stock HU and OEM amplifiers but its not cheap. A stock radio can run between $1,100.00 too $3,500.00 to replace depending on what it is and what maker... Just a FYI...

timisu87 · Post by **timisu87** » Mon Dec 03, 2007 10:01 pm

I had no intention of keeping the stock headunit but this is only for the time being. I will try to connection with the deck tommorow morning.

Post by **stipud** » Tue Dec 04, 2007 7:42 am

Wakeup wrote:So in other words, the line out for your LEft speakers switch it with your right....and your right line out switch it to your left in. etc.... see what happens....
If you get audio on your left speakers using your right channel...then.....your cabling is good...but your deck output is bad....etc...

Has this been done yet? Swap your RCAs around. If the opposite side now plays music, you can eliminate the amplifier and speaker wiring from your troubleshooting. That is already a huge help... then all you would have to do is figure out why your bad RCA isn't playing.

If the RCA switch doesn't help, then try switching the speaker wires around. If you can get the right speakers to play out of the left channel of the amp, then you have a problem with your right speakers or wiring.

Post by **bdubs767** » Tue Dec 04, 2007 7:58 am

1moreamp wrote:A stock radio can run between $1,100.00 too $3,500.00 to replace depending on what it is and what maker... Just a FYI...

Thatd just force me to go get some Pioneer ODR loving

Post by **mr tibbs** » Tue Dec 04, 2007 8:15 am

stipud wrote:
Wakeup wrote:So in other words, the line out for your LEft speakers switch it with your right....and your right line out switch it to your left in. etc.... see what happens....
If you get audio on your left speakers using your right channel...then.....your cabling is good...but your deck output is bad....etc...
Has this been done yet? Swap your RCAs around. If the opposite side now plays music, you can eliminate the amplifier and speaker wiring from your troubleshooting. That is already a huge help... then all you would have to do is figure out why your bad RCA isn't playing.

If the RCA switch doesn't help, then try switching the speaker wires around. If you can get the right speakers to play out of the left channel of the amp, then you have a problem with your right speakers or wiring.

No amp and stock HU, are there RCA's? If not he has to hack up his stock HU wiring harness.

Post by **stipud** » Tue Dec 04, 2007 8:36 am

mr tibbs wrote:No amp and stock HU, are there RCA's? If not he has to hack up his stock HU wiring harness.

Oops I missed that post.

So we've got a totally stock 1992 system then. No idea what car. Have you checked a junkyard for a new stock headunit? Should cost a few bucks, and is probably the most likely culprit if one whole side has stopped working.

timisu87 · Post by **timisu87** » Tue Dec 04, 2007 9:59 am

It was only a temporary headunit. I am ordering a Kenwood 491 later on this week. I can wait until then. It is a complete stock Isuzu Rodeo 1992.

Post by **Bfowler** » Tue Dec 04, 2007 10:05 am

I have been working with him for a little bit

The car is a 92 izuzu rodeo. With a factory head unit and now rsd coaxials. He has had this problem for a while and assumed the problem was with the factory speakers. He just swapped in the new rsd's and the problem is still present

Post by **mr tibbs** » Tue Dec 04, 2007 10:20 am

So it's either a problem with the factory HU or the factory wiring, unless you ran new wiring to the new RSD's.

timisu87 · Post by **timisu87** » Tue Dec 04, 2007 11:22 am

How hard is it to fix the wiring? I really hope its just the headunit.

Post by **Wakeup** » Tue Dec 04, 2007 12:25 pm

timisu87 wrote:How hard is it to fix the wiring? I really hope its just the headunit.

Can be hard fixing the wiring, cuz you have to find out where the wiring is open...or cut...or damaged.

Again, if you try my switching of the channels, then at least you can tell if it is the wiring or the deck.
Easy test IMO.[/i]

1moreamp · Post by **1moreamp** » Tue Dec 04, 2007 1:24 pm

Anybody got a set of Mitchell documents for the pin out and wiring ??

I would get the deck pinout and just use a test speaker on jumpers to bump each output to the speaker. If there is no signal at the deck it pretty much a no brainer its the HU. But if you get signal then its wiring. And if its all low level at the HU then I would be looking for a hidden amp somewhere.

Where are those hacked Mitchell doc's I had ?????????

Post by **mr tibbs** » Tue Dec 04, 2007 1:51 pm

Will this help??

1991-93 Isuzu Rodeo Stereo Information
Constant 12V+ White/Blue
Switched 12V+ Yellow/Red
Ground Black
Illumination Blue/White
Dimmer n/a
Antenna Right Front
Front Speakers 4" Dash
Left Front (+) Blue/Green
Left Front (-) Gray/Black
Right Front (+) Red/Green
Right Front (-) Brown/Black
Rear Speakers 5 1/4" Side Panels
Left Rear (+) Blue/Yellow
Left Rear (-) Gray/White
Right Rear (+) Red/Yellow
Right Rear (-) Brown/White

1moreamp · Post by **1moreamp** » Tue Dec 04, 2007 2:34 pm

Yes much Tibbs.
All he needs to do is connect speakers to each output one by one. if there is nothing wrong with the deck he should get music on all 4 outputs without issue.

no music its defiantly a HU issue. If he gets music its wire chase time, or just run new wires.. THX Mr.Tibbs

Its no impossible for a side of the output IC going south on the fella, and leaving him dead on one side. But I would have to look inside the Hu to verify a single or dual chip output. I have also seen current limit resistors inside these desolder and then you lose a set of outputs all because of bad solder on a SMD chip resistor. < if thats the case please use high temp silver solder on the rework....C

timisu87 · Post by **timisu87** » Tue Dec 04, 2007 3:29 pm

So basically from what I understand is that, I would first pull out the stock headunit and disconnect the wiring for the left side speakers and connect them into the right side to see if there is music. If this works that means that my left channel is blown out.

Is this correct? Do I just pull the wire and it come out?

1moreamp · Post by **1moreamp** » Tue Dec 04, 2007 3:52 pm

Nawh don't do that, Just remove the deck and test each speaker out with a hand held speaker and some jumper wires, by jumpering your hand held speaker to each output one at a time. If you don't have output on all 4 speakers Take the HU out to a shop.. C

timisu87 · Post by **timisu87** » Tue Dec 04, 2007 9:24 pm

Do not have any jumper wire but will definitely dry to find some. What is a hand held speaker?