218 Trademark Dr
•
Buda
•
Texas
•
78610
Phone
800.757.2581
•
Fax
844.894.2652
•
10
(c) 2016 SpeedTech Lights, Inc.
No
Yes
Improper Grounding.
If grounded incorrectly, an electrical feedback could be the
culprit. Electrical feedback can cause the PCB not to
recognize the command that it is being told to do.
Move the ground to proper location and see if this fixes the
issue.
A New PCB may be required.
Pressing buttons
on the Switch
Box but light bar
doesn't respond
at all or for
specific function
Does the STL Logo
on the Grand
Control Box light up
when on?
No
Yes
Improper Grounding.
Broken Cigarette Plug
Broken Fuse
Disconnected Connector
Damaged Cable
TEST THE
POSSIBLE
CAUSES
FOR "No"
Wires in the wrong
location
If grounded incorrectly, an electrical feedback could be the
culprit. Electrical feedback can cause the PCB not to
recognize the command that it is being told to do.
Move the ground to proper location and see if this fixes the
issue.
Inspect to cigarette plug to make sure there is no damage
or pulled wires from the plug. If so you will need to replace
the Cigarette Plug
If the cigarette plug is not damaged unscrew the cap of the
cigarette plug to gain access to the fuse. Check to see if the
fuse is broken. If do you will need to replace the Fuse.
Check that the connector is fully recessed in the switch box.
If you have an extension cable with connectors check that
the connection has not disconnected.
Check the full length of your wiring to make sure there are
no spliced wired in the cable harness.
TEST THE
POSSIBLE CAUSES
FOR "No"
You may have a wire that is not in the correct position. If
you are using an extension cable with connectors or no
