Car entertainment unit help

Is it this unit you've got? For Opel Mokka or Buick Encore.
https://www.witson.com/displayproduct.html?id=2698187724260800

What actually happens with the radio? is it scanning and not finding any stations? Is it making any sound at all, like hiss? If you want DAB radio, I think that's an optional extra unit.

 

So if the antenna is definitely connected, that sounds like it could be faulty then, and repair or replacement is required. I presume it's under warranty. Also just to be sure, is the FM band set correctly, should be 87.5 to 108MHz I think. Because I have seen some devices that have Japan FM mode selected.

 

Soo, this relies on a hot spot for reception ?

 

I know car head units usually have two 12V lines. One that is permanently connected to 12V for backup, and other connected to the accessory position, so the unit comes on when the ignition key inserted and turned to the first position.

Is that what they're referring to? Is there a copy of the installation manual you could post, might give me a better idea, as I don't know this unit at all.

 

Could be the car's radio antenna has an RF pre-amplifier that needs power? Think an Opel or Buick dealer would have to answer that. Although if the head unit was specifically made for this GM car, that should have been taken care of. Have you checked the car's fuse box, make sure nothing is blown?

Of course I don't know anything about modern GM cars. The last GM I had was a 1978 Chevette. Changing the radio/cassette on that was easy.

 

Red wire needs to be connected to constant hot (+)

Yellow wire needs to be connected to a "switched" hot (+), ie: ignition/accessory position on key switch.

I installed a power antenna once and it needed the blue wire as a "trigger", it sent 12 volts to the power side of the antenna when the head unit is powered up and retracts the antenna when the unit is shut off.

The blue wire will also power up the "on" mode for an external amp or other accessories, ie: active crossover or equalizer.

Note: the (blue) accessory trigger is not for a constant hot, it does not carry enough amp capacity to run as a constant positive lead.

Did you try googling the manual ?

 

Check the wires if they are properly connected if it didnt worked tell to the seller that he sold it to u it didnt worked made in china not original can u replace it to me? if he say yes he will replace it, if not tell him why and thats not good way to treat ur customers from the end!

 

As above, the antenna should have a "trigger wire" (switched hot) and a ground wire, just ground to any metal part of the car.