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Author Thread: Bypass ignition requirement for head unit
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irishgirl2001
Unregistered guest
Posted on Friday, July 16, 2004 - 02:17 pm:    Edit Post
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?
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GlassWolf
Gold Member
Username: Glasswolf

NorthWest, Michigan
USA

Post Number: 4017
Registered: Dec-03
Posted on Friday, July 16, 2004 - 04:29 pm:    Edit Post
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.
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GlassWolf
Gold Member
Username: Glasswolf

NorthWest, Michigan
USA

Post Number: 4018
Registered: Dec-03
Posted on Friday, July 16, 2004 - 04:32 pm:    Edit Post
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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