SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING
34
Electro-Mechanical Parking Brake Testing
NOTE: For this procedure, refer to FIGURE 3.4.
NOTE: This procedure should only be performed on wheelchairs with conventional motor/gearbox
assembly.
1. On the four-pin motor connector, locate the side by side connectors in the black
housings.
2. Set the digital multimeter to read ohms.
3. Measure the resistance between the two brake contacts. A normal reading is between
40-80 ohms depending on the motor.
NOTE: A reading of 0 ohms (
Ω
) or a very high reading; i.e., mohms or O.L. (Open Line) indicates
a shorted brake or an open connection respectively. If either condition exists, send the motor to
Invacare Technical Service for inspection/repair.
WARNING
A shorted electro-mechanical brake will
damage the brake output section in the
controller. DO NOT connect a shorted
electro-mechanical brake to a good
controller module. A shorted brake
MUST be replaced.
NOTE: A bad motor can damage the controller
module but a bad controller will NOT damage
a motor.
FIGURE 3.4
4 Pin Motor
Connector
Motor