Below is a list based on my interpretation of a 1974 Pinto schematic dated Aug 73. The drawings did not show plug pin numbers so I used letters which may be in order. The drawings did not completely agree with themselves, especially on the brake warning lamp & ckt# 640. So use with caution and have fun.
pin wire ckt # function
A not shown 48 fuel gauge via radio suppression choke & C/V unit, 2 wires on pin, not connected
A BK-LG H 297 fuel gauge via radio suppression choke & C/V unit to 8 ohm resistor positive side, 2 wires on pin
B BK 57 cluster illumination lamps & L.H. turn ind & R.H. turn ind & high beam indicator, ground side
C LG-BK 12 high beam indicator, positive side
D none pin empty, no wire
E LG 469 seat belt warning lamp, buzzer and seat belt ign module side
F R-W 39 oil pressure & temperature warning lamp, sender side
G Y-W 29 fuel gauge, sender side
H LG-R 904 alternator warning lamp, regulator side
I BK-LG H 297 alternator warning lamp, positive side
J LG-R D 162 brake warning lamp, negative side to park brake switch, 2 wires on pin
J P-W 977 brake warning lamp, negative side to dual brake switch, 2 wires on pin
K R-Y H 640 seat belt warning lamp, positive side, 2 wires on pin
K R-Y H 640 oil pressure & temperature warning lamp and brake warning lamp, positive side, 2 wires on pin
L LB-R 19 cluster illumination lamps, positive side
M LG-W 3 L.H. turn ind., switch side
N W-LB 2 R.H. turn ind., switch side