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What is an LED?
A light-emitting diode (LED) is a semiconductor device that
uses solid-state electronics to create light. An LED light source (or diode)
consists of a layer of electron rich material separated by a junction, from a
layer of electron deficient material. Both sit on a semiconductor base. Power
applied in the junction excites the electrons, which in turn emit photons of
light. The color of the light depends on the chemical composition of
the layers.
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How long do they last?
The expectant usage life of an LED is 100,000 hours of use,
or 11 years of continuous use.
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How do I mount them?
We currently have three mounting options, black nylon
mounting clips, clear mounting caps, and chrome or black plastic mounting
bezels.
Black Nylon Mounting Clips:
The black nylon mounting clips can be mounted
by drilling a 1/4 inch hole in any material up to 1/8 inch thick.
Press the clip into the hole and insert the LED up from behind.
Clear Mounting Caps:
The clear lens caps can be mounted by drilling a 1/4 inch hole in any material
up to 1/4 inch thick. Press the cap into the hole and insert the LED up
from behind.
Chrome or Black Plastic Mounting Bezels:
The chrome and black plastic mounting bezels can be mounted by drilling a 19/64
inch hole, in any material up to 1/4 inch thick. Then feed the LED's wires
through the top of the hole and secure the bezel with the supplied lock washer
and nut.
Additional Mounting Option:
We have had customers report use of glues and epoxies to mount our LED's.
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How much current do they draw?
The typical DC forward current draw is 0.02 amps
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What is their operating voltage?
Our LED's are designed to operate at their optimal
brightness with a positive DC voltage between 12 and 14 volts.
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Will they work with AC voltage?
Our LED's will work with AC voltage, however they will be
substantially dimmer than they would be if using DC voltage. Using AC voltage is not
recommended.
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What are the LED dimensions?
All dimensions are in inches. Bulb is has a diameter of
.193in. and has a height of .350in. With clip the total height is .389in
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What is an MCD and How many MCD's are the LED's?
MCD (short for millicandelas) is a measure of the
light output of an LED. The higher the MCD rating, the brighter the LED.
Our LED's operate between 3000 MCD (typical) and 4000 MCD (max). The only
exception is our Blue, Ocean Green, White, Pure Green, and Red/Orange LED's that have a rating of
4000 MCD (typical) and 5000 MCD (max). Additionally, our Purple/UV LED's are
measured in Ultraviolet output which does not reflect the visible light output.
Thus, the Purple/UV LED's appear to be less bright than our other eleven colors.
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Do you sell LED's that work voltage other then 12 volts?
We can modify our LED's to work with almost any DC voltage.
Please email us at
sales@dav-electronics.com with your voltage requirements.
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How do I wire them?
Wiring our LED's is simple. Just hook the black wire to
any ground wire or chassis ground. Then wire the red wire to any 12 volt
source. Please note that if you wire the red wire to a constant 12 volt
source, the LED will be constantly on.
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How far does the LED protrude above the black mounting clip?
The lens of the LED protrudes 0.135 inches above the
black nylon mounting clip.
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What Does TPSEM stand for?
TPSEM is short for Throttle Positioning Sensor Enhancement
Module.
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What is the purpose of the LED on the TPSEM?
According to
our research, consumers wanted a feature that showed
them when the TPSEM was working. Our response to this was to install
an LED on the TPSEM that illuminates when the TPSEM is engaged. Please note
that the LED comes mounted on the TPSEM. It is only visible under the hood, not
from inside the vehicle.
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What does the TPS do?
The TPS or throttle positioning sensor is a devise that has a
lever connected to the throttle plates of your throttle body. The TPS
outputs different voltage as the lever changes position. This allows the
vehicles computer to determine the position of the throttle plates.
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Where is my TPS?
The vehicle's TPS is usually located on the throttle body of
the vehicle. Please consult a manual for your vehicles TPS location.
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Are there any disadvantages to using the TPSEM?
The only disadvantage to using the TPSEM is that when it is
active it puts your vehicle into the open loop mode of operation with will
result in slightly increased emissions as the oxygen sensors are being ignored.
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How does the TPSEM work?
Below is an explanation of what happens when our TPS
Enhancement Module is active.
The PCM uses the TPS output voltage to determine whether the driver is pushing
down on the accelerator or releasing it. During hard accelerations, the PCM will
increase fuel delivery to prevent hesitation. During hard deceleration, the PCM
can cut fuel delivery completely.
There are two basic run-mode conditions open and closed loop. In closed loop
operation, the PCM monitors the precatalytic converter oxygen sensors to adjust
the fuel delivery to maintain a part-throttle air/fuel ratio very close to
14.7:1. Closed loop operation provides the best gas mileage and the lowest
exhaust emissions. But this is also the least effective for producing horsepower
and torque.
Open loop operation occurs when the engine is first started, or when the
throttle is in the WOT position. In open loop, the oxygen sensors are ignored
and the air/fuel ration is calculated by the PCM based on inputs from the engine
coolant sensor, the mass air flow sensor, the manifold absolute pressure sensor,
and the TPS.
When the throttle is in the WOT position, the PCM enters open loop operation and
typically tries to maintain an air/fuel ration of about 12:1. This open loop
mode is what is achieved when the TPS Enhancement Module is activated. The TPS
Enhancement Modules purpose is to put the vehicle in to the open loop mode
sooner which allows the engine to make more horsepower and torque.
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Will it work on a vehicle that is equipped with drive by wire?
No, our TPSEM can not be used on vehicles equipped with drive
by wire.
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What is drive by wire?
Drive By Wire is used in some GEN II 3.8L V6 engines and some
later model 5.7L V8 engines. Drive by wire refers to the fact that these engines
have no throttle cable from the pedal to the throttle body. Instead they are
electronically controlled by a sensor in the gas pedal that sends a signal via a
wire to a motor that actually actuates the throttle plates to correspond to the
amount the driver is depressing the gas pedal.
To determine If your vehicle is drive by wire, look to verify that you have
a throttle cable attached to the throttle body. This can further be verified by
manually advancing the throttle and seeing if the gas pedal moves if it does
then you do not have drive by wire. If you are uncertain please consult a
service manual for your vehicle.
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How do I determine my black wire location A or C?
Depending on your engine and year of your vehicle your black
wire (ground location) will be either in the A or C location. Use the
picture below and orentate your TPS plug to determine the location of the black
wire.
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How do I install the TPSEM?
The TPSEM installs inline with your TPS. To install
your TPSEM unplug the connector from the TPS. Then connect that plug into
the female plug on the TPESM. Then connect the male plug of the TPSEM into
the TPS of your vehicle.
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