IQ-275 Intelligent Lighting Controller (smart dimmer)
(Note: The IQ-275 replaces the IQ-175. It is easier to install and supports higher-power lamps.
For the new IQ-275 intelligent lamp dimmer (previously the IQ-175), this change greatly simplifies installation of the attached lamps as the lamp’s housing no longer needs to be electrically isolated from the chassis.
In addition, the power handling capability of the new controller has been increased. While the previous controller for P3 Lights, ST Lights and the Photon Blaster could provide 2.5 amps per side, the new controller can provide 6 amps per side. For the IQ-275 intelligent lamp dimmer the current rating has increased even more, from 6 amps to 12 amps per channel. When wired in parallel the new IQ-275 can source a full 24 amps, considerably higher than any current lamp dimmer available.
The IQ-275 Intelligent Lighting Controller from Skene Design allows you
to quickly and conveniently set the brightness of your auxiliary LED or
incandescent lights to match riding conditions.
Often auxiliary lights are too bright or have too wide a beam
pattern to operate at full power during the day or under certain road
conditions. With Skene Design's innovative
intelligent lighting controller you can pre-program several
different brightness settings and with the flick of a switch immediately
select the desired brightness.
There's no fumbling with a knob or a wireless remote trying to guess
the best level.
The IQ-275 has been designed by a motorcyclist for motorcyclists. It
allows you to quickly and safely select just the right brightness level
for you auxiliary lights
without having to look at a knob to turn or read a screen: you simply
flick a 2 or 3 position switch or double tap a button.
It has two possible modes of operation depending upon the type of
lights you have, driving or fog lights. In Driving Light mode, when your
motorcycle's high beam is off
the controller will set the auxiliary lights to one of several
user-programmed brightness settings depending upon the position of a
When the motorcycle's high beam is activated, the controller overrides
the switch setting and sends full power to the lamps.
In Fog Light mode, the same brightness selection is used but when the
high beam is activated the auxiliary lights are turned off.
Multiple brightness settings are available with the use of an
optional, customer-provided switch. If a two-position toggle switch is
used, two brightness
settings may be selected in addition to the high beam override. If a
three-position center-off toggle switch is used, three brightness
settings may be selected. Each of
these settings is adjustable from off to full brightness in 10% steps,
providing very flexible and convenient control over the lamps'
You can even use a momentary-contact pushbutton switch to toggle back
and forth between two brightness levels. (The turn signal cancel switch
on the right handlebar on BMW's can be used for this purpose.)
If no switch is used, the lamps will come on at a single, programmable
brightness level when the high beam is off.
See the wiring diagram below for details.
In driving lamp mode, activating the high beam switch sends full power to the lamps.
In fog lamp mode, activating the high beam switch turns the lamps off.
If no dimmer switch is used and the yellow wire is left disconnected, the controller can be programmed
to operate the lamps at any brightness from off to 100% when the high beam is off. If more brightness
levels are required, a two or three position toggle switch or a momentary-contact pushbutton
switch may be connected to the yellow wire as shown.
The table below shows the default brightness settings for each switch position.
Switch Position --
Yellow Wire Connection--
Default Brightness Level
Any 3-position switch as shown below may be used to switch brightness levels.
One example is the Trail Tech handlebar switch. Wiring for this switch is illustrated below
Note that each of the three positions may be programmed to any brightness setting, including off.
With this configuration, brightness settings for various riding conditions can be programmed into the
IQ-275 and instantly selected with the flick of the thumb, rather than having to look at and twist
a small knob as is required with other LED dimmers. Connect the IQ-275's white wire to the bike's
high beam wire to enable maximum brightness whenever the high beam is on.
When converting an off-road bike for road use, the above switch or any other 3-position, center-off switch,
programmed to OFF, LOW and HIGH brightness settings, can be used as a headlight switch . In such a
configuration the white wire would only be used only during the initial programming of the controller to set
the desired brightness levels. Programming is done by touching the white wire to +12 volts, as described in
the programming section of the manual. The white wire is then insulated and tucked out of the way.
Note that the button on this switch, as well as the high beam, may be used to program the IQ-275 and activate
the ALERT! feature on the IQ-275-A. The wiring for this is illustrated below.
The diodes are 1N4001 or equivalent, (1 amp, >50 volts).
The horn can also be used as an ALERT trigger, by connecting the hot lead on the horn to the
IQ-275-A's white wire as shown below.
The diodes are 1N4001 or equivalent, (1 amp, >50 volts)
The controller has two identical channels, each of which can power a 144
watt/12 amp load. The two channels can be connected in parallel to
a combined load of 288 watts/24 amps. This is the recommended
configuration if unequal loads are to be driven, as it will balance the
loads over both channels.
The positive connection from the controller can be connected through a
fuse directly to the vehicle's battery. No separate relay is required,
as the controller performs this function. This simplifies wiring,
eliminates extra components, and improves reliability compared to the
traditional relay wiring harness.
A unique ALERT! feature is available on the IQ-275-A model. This allows
you to rapidly modulate the brightness of the lamps attached to the
controller when you really need to be noticed by traffic ahead.
When you need to maximize your visibility, just tap your high beam
switch twice within one second, and the controller instantly responds
with a brief, but highly conspicuous flashing sequence.
No matter what brightness you have the lamps set to, even if they're
off, they will immediately flash at maximum brightness in a very
conspicuous sequence, like an over-caffeinated high-beam switch.
The sequence takes less than two seconds, but will greatly improve your
likelihood of being seen.
Normal application of the high beam or a single tap will not trigger the
ALERT! sequence, so it has no effect on your usual riding style.
Installation is quick and easy, and the controller can be used with almost any motorcycle.
A comprehensive installation guide and all necessary connectors are included.
Note 1: The 2014+ BMW R1200GS with LED headlight option
provides no access to the high beam wire, so a separate switch is
required to select high beam override and to program the unit. The model
with incandescent headlights works normally.
Note 2: Some LEDs have 3 wires rather than 2, where the third wire is a dimmer input. These include :
These lights require a slightly different wiring method and shown in Fig 1 below.....
- Denali dual-intensity DX and D2 models
- Cyclops Optimus
- VisionX Optimus
Note 3: While the great majority of aftermarket LED lights can
be used with the IQ-275, a few are designed such that they will not
operate properly with a dimmer. These include:
- Rigid Industries D Series Lamps (D2 and Dually) and SR models.
Models manufactured after 7/2013 are no longer able to support the
IQ-275 or any other dimmer due to a design change. Other Rigid LEDs work
with our controller.
- KTM 990 Supermoto Auxiliary LED Light Kit, part number: 62014910033.
- Denali D4: While early Denali D4 LED's were fully compatible with
the IQ-175 & IQ-275, the current model of this lamp is no longer
able to support the IQ-275 or any other dimmer due to a design change.
Other Denali LEDs work with our controller.
IQ-275 (A) Product Specifications
Controller Input Voltage: 12 - 16 Vdc
Controller current draw (red wire): 15 milliamps
Maximum lamp power: 144 watts (12 amps) each channel, 288 watts (24 amps) if both channels are connected in parallel
Maximum lamp operating voltage: 48 V
Programmable brightness range: 0 – 100% in 10% subjective brightness increments
Default brightness levels:
- Yellow wire connected to ground: 10%
- Yellow wire not connected: 20%
- Yellow wire connected to +12 V: 50%
Dimensions: L: 3" W: 1.38" H: 0.59"
Weight: 2 oz.Please note: