Bypass ignition requirement for head unit

 

irishgirl2001
Unregistered guest
On my Ford OE head unit it would work without the ignition on or key in. I put in a JVC MP3 unit using a wiring adapter (JVC is ISO) and now the ignition has to be on to activate the unit (it will eject cds etc without). Is there a quick way to bypass the need for ignition to turn on the unit?
 

Gold Member
Username: Glasswolf

NorthWest, Michigan USA

Post Number: 4017
Registered: Dec-03
sure.
wire the ignition line from the head unit to a constant +12V line (like the memory wire has) instead of using a switched +12V line.
then you have to remember to turn off the radio after you turn off the engine of course.
 

Gold Member
Username: Glasswolf

NorthWest, Michigan USA

Post Number: 4018
Registered: Dec-03
here's how to wire the head unit using relays so it stays on until the car door is opened as well:
http://www.the12volt.com/relays/page5.asp#drto
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