Technical Mk2b Help with Radio Constant Power

[supertx2]

I just Instaled an aftermarket radio following the guides on the forum, It's working normaly when I turn the ignition on but when I turn it off I lose all the settings on the radio and I have to configure it again.

I attachmented the diagram on my stock radio.
The circle that I drew shouldn't be my constant power?

 

[crankshaft]

I am not particularly knowledge with the mk2b stereo, so I am not sure if I can help much.

NC means not connected, so there shouldn't be any cables there.

You have 2 CAN line cables going to the stock radio, don't connect those to the aftermarket radio you bought. (CAN A CAN B) They should be disconnect!


There's 3 more cables, one "Ub" I assume is constant power. The other one is a ground cable (ground symbol) and a third cable (ANT) that is used to signal an external powered antenna or amplifier to turn on, also present in the mk2a stock radios.


From what I understand, the mk2b radio receives constant power, between "Ub" and "Ground". The stock radio got the information of the ignition being on or off, and whether the lights or on or off from the CAN Bus. The aftermarket radio can't use that.
You don't have separate ignition power, and a constant power there, I think you only have constant power.

It's what I understand from that diagram. You are saying you lose power when you switch off the ignition, and I don't see why that would happen according to that diagram. The diagram shows you have constant power, and no indication, or power coming from the ignition switch.

Can you tell us what cables are connected where in your aftermarket radio?

 

[Currymunster]

Buy a piggyback fuse and plug it in the cigar lighter space in the fuse box. Then run the wire to the back of the stereo.
That will give you your permanent live.
NC I believe usually means normally closed.
NO I believe usually means normally open.
But hey. This is a car so I could be wrong.