look like you mess up the wiring to ignition and wiring to battery, there should be 3 power wire , one is to chassis should be connect permanent to car metal body to get negative (-); two Positive (+) 1. To ignition coil so when you turn key off radio is off. 2. To fuse, power direct from battery even your key pull out but your radio clock and memory still preserve because the power from this line are direct from battery.



This post has been edited by ngeo88: Mar 2 2016, 09:12 AM

pakai this to test

can Diy the probe by using multi meter test lead and a 12VDC bulb