I switched back in my 91camaro to a stock delco tape radio and now there is no sound from the left rear speaker.
I checked the speaker and changed from right to left but still no sound.
Measured the wires from the radio connector back to the speakers. No broken wires.
I have the delco 10ohms 6x9" speakers
All other speakers working fine.
​​​​​Any suggestions for my issue?



​​
​

 

Probably some broken solder joints in the radio--very common and an easy fix if you can take a radio apart and resolder a few connections.

 

I'm guessing the left AMP. Most of the time right speaker problems are related to blown caps, but in my experience most left speaker problems are due to bad a bad AMP chip. Could be an uncommon Capacitor problem, but just about every time I try to repair a radio & chase a left speaker problem,..... its a dead AMP.

 

Does the cassette use the same amp as the radio? I have no left channel output while using cassettes but with just the AM/FM it works fine. It is not the cassette or mechanism. I bypassed it with aux from the cassette LR output and it still only gave me the right channel.

 

Yes,... The cassette deck uses the same 2 AMP chips as the FM. If you have good sound using FM - but missing 1 channel when using the cassette deck; the cassette mechanism is the problem. ( I assume that you've 'tapped' into the cassette L&R outputs from the cassette deck-to-the radio for the AUX,... this proves the cassette is the problem. )

 

I bypassed it with aux using the L and R casette outputs that go into the radio pcb connector. It still only gives me Right side only. FM works fine. Do you know what the Blue wire is on the cassette pcb to the radio pcb connector?

 

I don't know what the wire ID is for all the wires on the plug. I'm assuming it's an EQ radio cause I don't remember a BLUE wire on the non-EQ decks.