Have Toyota Questions? Ask a Mechanic for Answers ASAP
Thank you for trusting us with your questions. Is this a factory Toyota amplifier? Are ANY of the speakers working?
NONE of the door speakers are working??
Sorry to be so long in responding, I seem to be having some network issues. I'm trying to get the wiring diagram for your vehicle sound system pulled back up.
In the underhood fuse box, there is a 30 amp fuse marked radio No. 2. Check this fuse for power using a test light or a digital voltmeter.
Did you check both sides of those fuse for power using the meter? That's what we need to check.
Without removing the fuse, check for power at the small test points on top of fuse. Check both sides. In almost no cases is testing resistance a good practice on automotive wiring. Results can be VERY misleading, which is why we always check for power.
No problem, I'll be on/off this evening as well. Turn ignition on.
Will need to check the power wire at the amplifier. Do you have access to any straight pins, or even safety pins will work. Do you know how to backprobe a connector for electrical testing?
Basically, its using a pin of some sort to create an exterior test point at the connector while keeping it plugged in. See this youtube video.
This connector is S31 and has 2 power inputs to it. They are the white wires with blue stripes in pins 1 and 5. There are more to check in other connectors. I will send them in following messages.
This one is connector S23 and has one power input. It is the gray wire at pin 12.
The last one is connector S24 ad has 3 ground wires in it. They are in pins 6 and 7 on brown wires.
If all those power and grounds check out OK, it looks like an amplifier will need to be replaced.