29
Chapter 5: Servicing the Lightbar
6. Use a 5/16" nut driver to remove the nut securing the ground connection to the
aluminum extrusion. Remove the ring terminal from the ground stud.
7. Remove the #8-32 Phillips screw securing the ground wire (GND) to the end PCB and
remove the wire from the board.
8. Cut any wire ties that group the wire connections to the end board.
NOTE: The colors of the wires connected to the end board are silk screened next to their
connectors.
9. Disconnect wires and harnesses from the end board and remove it from the lightbar.
Installing an End Board
1. Reconnect the wires and harness to the end board and secure them with plastic ties.
2. Reconnect the black ground wire (GND) to the end board with the #8-32 Phillips screw.
DO NOT OVERTIGHTEN SCREWS/NUTS
To avoid damage to the lightbar, do not overtighten the screws and nuts.
3. Reconnect the ground wire to the aluminum extrusion with the 5/16" nut.
4. Secure the end board to the end bracket with the eight 1/4" hex-head screws.
5. Slide the end dome onto the aluminum extrusion.
6. Secure the nameplate and end dome with the two 1/4-20 screws.
Replacing the Control Board
The control board generates and receives the signals that control the lightbar’s flash patterns. If
the lightbar fails, the problem may lie with the board. The board is underneath the passenger-
side end PCB. The board also has two 15 A fuses that protect the lightbar. To replace them, see
"Replacing a Fuse" on page 31.
STATIC SENSITIVE DEVICE
The PCBs can be damaged by an electrostatic discharge (ESD). Follow anti-static
procedures while servicing the PCB.
Removing the Control Board
1. Disconnect power to the lightbar.
2. Remove the end dome and end board from the passenger side of the lightbar as
described in "Removing an End board" on page 28.
3. Use a 5/16" nut driver to remove the ten hex-head screws securing the end bracket to
the aluminum extrusion (Figure 5.4 on page 28).
Summary of Contents for JetSolaris JLX Series
Page 2: ......