GTT Opticom GPS System Installation Manual page 54

Intersection Equipment Installation Instructions
Table 9-1. Troubleshooting Symptoms, Possible Causes, and Solutions (continued)
Intersection alternates displaying
and dropping the left turn arrow
when approaching vehicle has left
turn signal activated.
Intersection does not display left
turn arrow when approaching
vehicle has the left turn signal
activated.
Vehicle brake light bulb shared
with turn signal indication.
Emergency flashers are active.
Driver is using turn signals to
indicate lane changes
Controller or phase selector not
programmed correctly.
Vehicle brake light bulb shared
with turn signal indication.
Emergency flashers are active.
Controller or phase selector not
programmed correctly.
Reconnect vehicle turn signal
sense lines to front turn signal
wires.
Turn of emergency flashers
Avoid using turn signals for lane
changes
Reprogram controller or phase
selector.
Reconnect vehicle turn signal
sense lines to front turn signal
wires.
Turn of emergency flashers
Reprogram controller or phase
selector.
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