All values measured to ground unless otherwise noted
Conn./Plug/Pin	Pin Information	Test Value	Comments
K39
1	Power output, supplies fanfare horns	12 VDC with fanfare horns activated
3	Circuit 15 main power input supplies horn relay solenoid high side and relay contact for horn function	12 VDC with ignition on	Feed from F1
4	Horn signal switched ground input to solenoid low side	0 VDC with horn switch depressed 12 VDC with horn switch not depressed	Feed from S4/2
2, 5, 6	Pins not used