I check the power on regulator U8 (I have 5v) when I use power plug.
On my radio lead I have 12VDC betwin pin 6 and 7
When I plug the radio lead after connect it to tracker, I have only
2VDC betwin pin 6 and 7 of DB9 connector ??!! and 1.5 v on U8
regulator. I unplug the radio lead and check again the power. I have
12VDC. It's strange