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'LIVEWIRE?' · 4th Aug 2010, 11:25 am

This '90s Car Stereo has a fault somewhere in it's switching circuit, which means that (a) approx. 300mA is drawn via the PERMANENT +12v supply, and (b) The radio is still powered when it's on/off switch is turned off, although the switch itself is working as it should. I have checked switching transistors & related components to no avail. Even with a sub-panel containing these components is un plugged(which also removes the Accessory supply)some 300mA is still being drawn via the permanent supply line-much higher than it should be. If all else fails, I'll power both the permanent and accessory lines via the ignition, as I suspect the fault may be difficult to pin down/rectify, but can anyone reading this help with a proper cure?

4th Aug 2010, 11:25 am	#1
'LIVEWIRE?' Rest in Peace Join Date: Mar 2006 Location: N.W. Oxfordshire(Chipping Norton) Posts: 7,306	Clarion/Range Rover PRC8290(PU9590C) This '90s Car Stereo has a fault somewhere in it's switching circuit, which means that (a) approx. 300mA is drawn via the PERMANENT +12v supply, and (b) The radio is still powered when it's on/off switch is turned off, although the switch itself is working as it should. I have checked switching transistors & related components to no avail. Even with a sub-panel containing these components is un plugged(which also removes the Accessory supply)some 300mA is still being drawn via the permanent supply line-much higher than it should be. If all else fails, I'll power both the permanent and accessory lines via the ignition, as I suspect the fault may be difficult to pin down/rectify, but can anyone reading this help with a proper cure?