Antilock Brake System - Manual Revisions
85ford05 ELECTRONIC ANTI-LOCK BRAKE SYSTEM
TSB #: 033552685
ELECTRICAL AND VACUUM TROUBLESHOOTING MANUAL REVISIONS 1985 LINCOLN CONTINENTAL/MARK VII SUPPLEMENT
This bulletin covers the electrical circuits of the Anti-Lock Brake System for the 1985 Mark VII/Continental. It is intended to be used with the 1985 Mark VII/Continental Electrical and Vacuum Troubleshooting Manual.
The circuits described in this article are only those that are different because of the AntiLock Brake system. The 1985 Mark VII/Continental EVTM shows the circuits which are the same for all vehicles. Refer to the 1985 Mark VII/Continental EVTM for instructions on How to Use the EVTM and How to Find the Electrical Problem.
The schematic diagrams, and the component location charts refer to pages with and without the letter S. The pages referenced with the letter S are covered in this bulletin. The pages without the letter S refer to the 1985 Mark VII/Continental EVTM.
EXAMPLE:
FUSE Refers to pages 22 and 23 of the
PANEL 1985 Mark VII/Continental EVTM.
Page 22, 23
POWER Refers to page 3 of this bulletin.
DISTRIBUTION Page 3S
2s GROUNDS (G100 AND G400):
2s GROUNDS (G100 AND G400)
3s POWER DISTRIBUTION (FUSE 5):
3s POWER DISTRIBUTION (FUSE 5)
4s ELECTRONIC ANTI-LOCK BRAKE SYSTEM:
4s ELECTRONIC ANTI-LOCK BRAKE SYSTEM
5s ELECTRONIC ANTI-LOCK BRAKE SYSTEM:
5s ELECTRONIC ANTI-LOCK BRAKE SYSTEM
6s ELECTRONIC ANTI-LOCK BRAKE SYSTEM
HOW THE CIRCUIT WORKS With the Ignition Switch in the RUN position, power flows through Fuse 5 to the Electronic Control Module. The Electronic Control Module turns on the Check Anti-Lock Brakes warning indicator in the overhead console through Circuit 606 (W/LB D). The power also flows through Fuse 5 to the Hydraulic Pump Motor Relay. The relay is energized and the pump motor runs, building up pressure in the system. The pump motor relay is grounded through the Pressure Switch to the Electronic Control Module. When the system pressure is low, the switch is closed and the pump runs. When the system pressure reaches normal operating pressure, the switch opens, and the Hydraulic Pump Motor Relay is de-energized. This turns the pump off. When the pressure in the system drops below a preset amount, the pressure switch closes again and the pump motor turns on until the pressure again builds. The two-pin Fluid Level Switch opens when the brake fluid level in the reservoir drops too low. This signals the Electronic Control Module which turns on the Check Anti-Lock Brakes warning indicator. The three-pin Fluid Level Switch closes when the brake fluid level in the reservoir drops too low. This turns on the Brake warning indicator in the Lower Warning Indicator Module in the instrument panel. The Main Hydraulic Valve controls the Anti-Lock Brake System. If the system becomes inoperative, the Main Hydraulic Valve is closed and the normal power brake system takes over. Four Wheel Sensors and Toothed Sensor Rings are used to signal the Electronic Control Module. Each wheel has a sensor and toothed sensor ring. As the wheel rotates, the teeth on the sensor ring make and break the magnetic field in the wheel sensor. The Electronic Control Assembly monitors these signals. If one of the wheels should lock up, the Electronic Control Assembly senses this and signals the solenoid valve for that wheel to release the brake pressure. When the wheel begins rotating again, the Electronic Control Module senses this and signals the solenoid valve for that wheel to again apply brake pressure.
TROUBLESHOOTING HINTS Refer to the 1985 Car Shop Manual Supplement covering the Anti-Lock Brake System for Mark VII/Continental and the Load-Leveling System for the Lincoln Town Car, Ford Crown Victoria/Mercury Grand Marquis Vehicles for complete system troubleshooting.
7s ELECTRONIC ANTI-LOCK BRAKE SYSTEM
COMPONENT LOCATION Page-
Figure Color Terminals
Electronic Control In luggage compartment under package
Module............... tray ..................................................... 8S-1
Solenoid Control Valve
Body................. On power booster assembly ........................... 8S-2
Anti-Lock Motor ................ On power booster assembly ............................ 9S-3
Connector C106 ................. RH side of steering column support ............... GY 8
Connector C159 ................. LH fender apron ........................ GY 8
Connector C163 ................. RH fender apron ........................ GY 6
Connector C350 ................. At anti-lock module .......................................... GY 35
Connector C406 ................. LH fender apron ............................................... GY 12
Connector C459 ................. LH fender apron ......................................... 8S-2 BR 6
Ground G100 .................... LH side of engine .............................................
Ground G210 .................... Near anti-lock module ...................
Splice S15O ............. At RH rear door.........................
Splice S151 ............. On RH cowl panel.......................
Splice S152 ............. Near LH radiator support.................
Splice S180 ............. Near anti-lock power relay................
Splice S181 ............. At anti-lock motor .............................................
Splice S401 ............. LH fender apron near battery ...........................
Figure 1 - Anti-Lock System:
Figure 2 - Master Cylinder and Hydraulic Booster:
8s ELECTRONIC ANTI-LOCK BRAKE SYSTEM
Figure 3 - Hydraulic Pump and Motor:
Figure 4 - Reservoir with Fluid Level Warning Switches:
9s ELECTRONIC ANTI-LOCK BRAKE SYSTEM
Figure 5 - Front and Rear Wheel Sensors:
10s ELECTRONIC ANTI-LOCK BRAKE SYSTEM