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GTM 25 Instructions EN–5
4. The internal antenna is sufcient in strong
signal areas. To increase the signal range,
connect the external antenna (if it came with
one) to the trafc receiver. Use the attached
suction cups to route the external antenna
on the windshield vertically, if possible. Do
not obstruct the driver’s view.
External antenna
External antenna
connector
GTM 25
5. Route the trafc receiver so that it does not
interfere with vehicle operating controls.
6. For added support, attach the additional
suction cup anywhere on the trafc receiver.