system shut down.

Do you have a volt meter?  Your problem is a lack of current getting to the yellow wire of your radio.  Or not a good enough ground for your radio.  With the radio playing loud enough to make it "Skip" you need to check the voltage on the yellow wire of the radio.  When checking that, you need to ground the black lead of the meter to the chassis of the radio.  When checking that you need to ground the black lead of the meter to the chassis of the radio.   Notice the lowest reading you saw on the meter.  Now ground the black meter lead to another ground location, notice the lowest reading there.  Post what you find.