TROUBLESHOOTING GUIDE - CIRCUIT DIAGRAM
U-4wiring diagramUnverifiedDiagram references both U.S.A and Canada routing (FOR U.S.A / TOP CANADA labels).
CIRCUIT DIAGRAM
A/C System Circuit Diagram
Components (15)
Battery (FROM BATTERY, A/D FAN 30A)From ignition switch (WIPER 30A)From ignition switch (HEATER 30A)A/C relayAdditional fan motorRefrigerant temperature switchMagnetic clutchThermo switchMeter thermo switch (Z-26)Engine control unit (Z-18)Heater controlA/C switchBlower switchBlower motorResistor
Connections (17)
Battery (FROM BATTERY, A/D FAN 30A)
Battery (FROM BATTERY, A/D FAN 30A)A/C relayBlue with Yellow stripe
A/C relay
A/C relayAdditional fan motor??
A/C relayRefrigerant temperature switch??
A/C relayEngine control unit (Z-18)Blue with Black stripe
A/C relayEngine control unit (Z-18)Black with Yellow stripe
Refrigerant temperature switch
Refrigerant temperature switchMagnetic clutch??
Thermo switch
Thermo switchEngine control unit (Z-18)Blue with Green stripe
Meter thermo switch (Z-26)
Meter thermo switch (Z-26)Engine control unit (Z-18)Blue with Green stripe
Heater control
Heater controlA/C switchGreen with Red stripe
From ignition switch (WIPER 30A)
From ignition switch (WIPER 30A)Heater controlBlue
From ignition switch (HEATER 30A)
From ignition switch (HEATER 30A)Blower motorBlue
Blower motor
Blower motorResistorBlue with White stripe
Resistor
ResistorBlower switchBlue with Red stripe
ResistorBlower switchBlue with Yellow stripe
ResistorBlower switchBlue with Black stripe
Blower switch
Blower switchA/C switchBlue with Orange stripe
A/C switch
A/C switchEngine control unit (Z-18)Black