Diagnostic Aids

CIRCUIT DIAGRAM

ABS Circuit:

ST1. Battery
ST2. Terminal post
ST5. Ignition switch
AB1. 30 amp MAXI fuse - pump relay
AB2. Pump relay - black
AB3. Hydraulic pump
AB4. Hydraulic pump pressure cut off switch
AB5. Pump low pressure warning switch
AB6. Reservoir fluid level switch
AB7. Diode
AB8. Brake fluid pressure/level warning light
AB9. ABS warning light
AB10. 5 amp fuse, pump relay
AB11. 5 amp fuse, pin 9 ECU, diagnostic plug, brake light switch
AB12. ABS warning light relay - green
AB13. 25 amp fuse, valve relay
AB14. Valve relay - black
AB15. Diagnostic plug
AB16. Electronic control unit (ECU)
AB17. 35 way connector to ECU
AB18. Brake light switch
AB19. Brake lights
AB2O. Multiplug to booster unit

Booster Unit Components AB21-25

IV Inlet valve
OV Outlet valve

AB21. Isolating valve
AB22. Front left solenoid valves
AB23. Front right solenoid valves
AB24. Rear left solenoid valves
AB25. Rear right solenoid valves
AB26. Sensor connectors (4)
AB27. Front left sensor
AB28. Front right sensor
AB29. Rear left sensor
AB3O. Rear right sensor

a. 12 volts from fuse A5
b. To bulb check unit

Cable Color Code

B Black
U Blue
N Brown
G Green
S Grey
0 Orange
K Pink
P Purple
R Red
W White
Y Yellow