Sounds like something was shorted out while replacing your ignition or you damaged a ground wire. You can try connecting just the 12+vdc switched lead to 12+vdc power and then ground the receiver to a chassis ground somewhere else to see if it is just a grounding issue. The yellow lead (memory) will also need to be connected in higher end units such as Alpine as the audio amp pulls from the memory lead rather than switched lead.
SOURCE: Installing Pioneer DEH 1500. Power
Hi, are you talking about the colors of the head unit wires or the car wires? Please tell me your car model and year.
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well if it helps any i got a 91 Volkswagen Golf GTI . i am getting power thru yellow cable "12 volt supply" i am not getting any power thru the red "ignition switch 12 v dc " i do need to install a new ground tho too easy . Also when i hooked it up my amp lights came on but nothing thru deck or face plate , i tried the reset button and nothing ....
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