SECTION 2—SAFETY INSPECTION/TROUBLESHOOTING
22
Electro-Mechanical Parking Brake Test
NOTE: For this procedure, refer to FIGURE 2.2.
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 (2) brake contacts. A normal reading is
between 45-100 ohms depending on the motor. A reading of 0 ohms (W) or a very high
reading; i.e., MEG ohms or O.L. (out of limit) 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.
Proper controller operation regarding brake function should be performed when-
ever a shorted brake is found and replaced.
NOTE: A bad motor can damage the controller module but a bad controller will NOT damage a
motor.
.
FIGURE 2.2
Electro-Mechanical Parking Brake Test
4 Pin Motor
Connector
Motor
Cap
Digital
Multimeter
