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Originally Posted by WhiteBird00  before replacing anything. First, make sure the amp has power and ground. Use a test light |
Never use a test light in a car with a BCM. NEVER EVER EVER EVER EVER. In fact, I wouldn't use a test light on any car with a computer. You don't want to test the wrong wire at any point in the vehicle and have an airbag deployed in your face. I've seen it happen with test lights, it's very dangerous and very painful. You can also damage sensitive electronics. It's standard practice to use a DMM for all electronic circuit testing in newer cars. Multimeters have continuity testing as well, you don't need to use a test light.