toyota car speakers suddenly not working

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  #1  
Old 09-21-05, 09:19 PM
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Location: metro Detroit
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toyota car speakers suddenly not working

00 toyota corolla CE 4-door
62,000 miles
no history of electrical or any other problems
stock cassette am/fm radio, no CD player, no amplifier

Hello everyone. i replaced the four factory speakers 5 days ago with Pioneer 220 watt speakers. all connections were spliced, wire-nutted & electrical taped. worked great with stock toyota radio. i replaced stock toyota radio with a new pioneer am/fm cd player. using an after-market wire harness & pioneer's wiring harness, wires were wire-nutted & electrical taped. speakers & new radio worked great for a few days. when i started car today, no sound from speakers at all, except for a slight "thump" sound coming from rear speakers each time new radio is powered on. power getting to new radio, radio displays cd operating or tuning fm stations is ok. pioneer technician seemed to think new radio has faulty internal amplifier. however, i replaced new radio with former toyota stock radio with same results; slight "thump" noise from rear speakers, radio getting power, etc. i simply unplugged wiring harness from toyota wiring connectors & plugged in former radio into toyota harness. no amplifier was installed.

i checked the three different radio fuses according to corolla's owner manual. they appear fine. my Haynes manual does not have much speaker/radio information at all. ground wires from new wiring harness are intact & screwed securely to metal body ground too. i have played with the fader & left/right, volume knobs but still nothing from any speakers with either radio.

i cannot locate a wiring diagram for the door or rear speakers. could i have blown speakers by getting positive/negative mixed-up? why would all four brand-new speakers suddenly fail at same time? i chose pioneer because i've had very good luck with their home components.

any advice appreciated. also, thanks for taking time to read this thread!
 
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  #2  
Old 09-21-05, 10:48 PM
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Join Date: Dec 2001
Location: nc
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You may have one speaker wire shorted to ground.
Disconnect all speakers completely (both wires, each speaker) at the stereo speaker harness and connect them back one at a time to see if you can get any sound. If you find just one speaker that doesn't work check the connection to it. A connection may have come loose through vibration, closing the door, wire getting caught up while rolling the window up or down, etc., resulting in a short. If The connection is good, check the speaker wire for a short to ground.
 
  #3  
Old 09-22-05, 01:16 PM
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thank you Jeff! yes, one of the speaker connectors was touching ground. very simple fix! i wouldn't have thought one speaker malfunction would disable the other speakers; i learned something new today, and everything sounds great! i will dedicate my tonight's TV watching to you Jeff...thanx!
 
  #4  
Old 09-22-05, 03:06 PM
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Join Date: Dec 2001
Location: nc
Posts: 616
I hope you're watching Survivor then...LOL.
 
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