Service manual

Course # 1 Manual
Rev. 1/02 page # 18
Service & Parts Education
WIRING HARNESS TESTING
1. Check the wiring harness for visible damage, broken/loose connections, and corrosion.
If any damage is found replace harness, or repair it with factory equivalent parts. If the
damage is due to corrosion, clean all connections thoroughly. Corrosive connections create
high resistance, which could cause problems with the electronics.
2. Check all fuses in the system, which includes inside the battery boxes.
3. Check all connections inside each supplied battery box. Battery boxes have an in-line
BUSS/MIDI fuse inside one of the boxes, use your volt meter to test this fuse.
TECHNICIANS NOTE: Set your volt meter up to
perform an audible continuity check, and check
all connections that are suspected of not making
good contact.
TECH TIP: If wiring was damaged due to inconti-
nence, use an old pneumatic tire tube and tie wraps to
cover major connections on the harness.
17
Invacare Corporation has initiated a field correction involving certain Invacare power wheelchairs manu-
factured from 1988 through June 2000. Some of these power wheelchairs utilize a battery box harness
and a charger harness that have the remote possibility to short and cause a fire. While the likelihood of
this occurring remains remote, all potential for fire must be eliminated. If you have a consumer who has
purchased a power wheelchair during these time periods, please contact Invacare for details on how to
get the new components installed.