In Antwort auf:

i have a'n after-market radio.. the radio only needs a constant 12v and a switched 12v to work...


Don't forget ground


In this case it makes really no sense...

Some funny lads don't know how to replace the original connectors for after-market-radios, sometimes the blue/white wire is the problem - the speedometer-signal-wire.... somewere behind the radio... look if it fit well in a (unused) connector.

Gruess Roy http://roy-fuchs.smugmug.com/