Maintaining and Servicing the Integrity
41
Installation, Maintenance, and Service Manual
Federal Signal
www.fedsig.com
Problem
Corrective Action
The light bar has a delayed response to
being shut off
• Ensure that the connections on the Serial Interface Module are kept
separate from strobe supplies.
• Check all the ground connections, especially on the Serial Interface
Module.
• Reset the controller (page 39).
A Flash Takedown/Alley light stays on
with ignition power applied
• Ensure that there is no voltage on the corresponding control wire.
• To see if the ROC board is bad, swap it with a similar board.
• Swap the cables on the light bar controller outputs with a known
good output. If the problem moves to another halogen light, send
the light bar controller to Federal Signal for repair.
• Reset the controller (page 39).
Takedown/alley lights work, but Flash
Takedown/Alley lights do not work
• Ensure that 12 Vdc is applied to the takedown and alley (red/black)
control wire.
• Check the 12 Vdc power and negative ground connections to the
light bar to ensure there is enough current.
• Reset the controller (page 39).
Only one takedown light turns on
• Check the connections from the light bar controller to the ROC
boards and ensure they are in the proper locations.
• Reset the controller (page 39).
SignalMaster LEDs do not light
• Check the switch settings on the Serial Interface Module. Ensure
that they are set for the correct operation. See Table 5 on
page 15.
• Ensure that Switch 4 on SW-2 is in the correct position for the
selected operation on the Serial Interface Module and ignition power
was removed and reapplied.
• Check the connections at the SignalMaster controller. If the
controller is a model SS2000SM, ensure that the connector has
power and the ground is connected to pins 10 and 11 on the
SignalMaster plug.
• Reset the controller (page 39).