Car Audio Engine Noise Flow Chart

Step 3 : Isolate power supply.
	Step 3
	Here we are attempting to isolate the effects of RF and EMI from our power wire and/or amp location; it takes a bit of work, but will help eliminate this issue as a potential problem.
	This is extream, but you need to physically remove the amplifier from its installed location, and locate it on a bench close to the car. Now, connect a single power lead (equivilent gauge to the power wire used in the car) to B+ (12v positive) and a seperate lead to battery ground. Using an 18ga test leed, make a jumper wire connection from main power on the amp to remote turn on of the amp. With the test speaker connected as before, and the test RCAs connected as before, press your thumb against the center pin of the RCA, do you still have noise?
	[ Yes \| No ]