heyy all,.im a new..and i need to check the wires in a 94 ford bronco,...something with the radio no going on and the factory one does not work now...anyway i got wire codes,..but my test light went MIA...how do you test the wires with a voltmeter,..thanks
you should get +12V on the constant lead. Ground should still get you the +12V on the constant lead when you move the negitive test probe from metal on the car to the Ground lead. you should get nothing on the ACC lead till you turn the car to ACC on the ignition.
for speakers, they should read 4 ohms a piece or whatever they are rated at.