Hey All,
I modded my Visteon Hd Radio to automatically trigger my car's power antenna to extend when the radio turned on.
Before I show you how to do this, I gotta do a slight disclaimer:
The pin I used to carry the +12V for the trigger signal appears to have nothing else was connected to it (ie: it was floating and not GNDed or anything else that I could tell). I have tested it on/off for a couple of cycles and everything looks fine. No overheating, burning smell, etc. Hence I'm going to publish this. As always, perform this mod at your own risk! Dont blame me if something messes up.
Ok, so here it is.
-There are 2 relays inside the RF cage of the unit.
-We connect +12V (from the power supply connector) to the NO pin on the second relay ONLY.
-As far as I can see the NO pin (only on Relay 2) was always floating!
-Relay 1's NO pin likely goes to the iBiquity RF unit.
-After performing the mod use a male motorola plug header in ANT OUT to access the +12V line to trigger your power antenna.
NO = Normally Open (If the relay has no power this contact is NOT connected to C)
NC = Normally Close (If the relay has no power this contact IS connected to C)
C = Common
When you apply power to the relay's coil, the C contact will become connected to NO not NC.
Cheers,
Ice
Linear Mode
