[SVXdc]

Like Landshark said, you should see +12V between the dimmer wire and ground when the headlights are on. You have to turn on the key and the headlights switch. The parking lights button won't do it.

A voltmeter is a good tool to have. There are ones even cheaper than $20 if you look around.

If you don't have one, you could always borrow a 12V bulb (tail light, perhaps) and test with that.

To test the speaker wire, a 1.5V battery will suffice. You'll hear a thump when you first connect the battery as the cone moves. As Landshark said, don't hold the connection, just touch it briefly.


Now please tell me that your SVX's factory harness had already been cut off by a previous owner or installer. If your harness was intact, you could have used one of my wiring harnesses and avoided the issue with the Red/Black wires.