Electronics International FP-5L - Manual (Page 8)

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5. Route the Power and Ground Wires:
In the wire harness are two sets of red and black 6' wire bundles used for the fuel pressure transducer and the
fuel flow transducer. Also, there are red and black 3' wires used for instrument power and ground. Route the 3'
red wire in the harness to the aircraft’s 12 or 24 volt main or emergency bus as applicable via an independent
circuit breaker (five amps or less). An alternate method would be to route the red lead to the bus via a one amp
in-line fuse. With this method a spare fuse must be kept in the aircraft. Route the 3' black wire in the harness to
a good ground . Tie wrap these wires so they do not obstruct the freedom of travel of any controls.
6. Route the Backlight Wires:
Connect the backlight wires as follows:
A. It is recommended to permanently power up the digital display backlight.
1) For a 12-volt system connect the white/brown wire to the bus and connect the white/red wire to
ground (see Wiring Diagram).
2) For a 24-volt system leave the white/brown wire open and connect the white/red wire to the bus
(see Wiring Diagram).
B. Connect the white/orange wire to the panel light rheostat. This wire will dim the Display Mode
Indicator LEDs for night operation when the panel lights are turned on. If this line is left open, the
Display Mode Indicator LEDs will remain at full intensity at all times. Also, if the voltage on this line
drops below 11.5 volts, the analog LEDs will be displayed at full intensity. Tie wrap all wires so they
do not obstruct the freedom of travel of any controls. Note: This line may be connected to the CP-1
Intensity Control Pot (see price sheet.
7. Route the (Optional) External Warning Control Line:
The white/yellow wire can be connected to E.I.'s external light (model AL-1), buzzer (model ATG-1), voice
annunciator (model AV-17), a relay, etc. This wire grounds when the red warning light is on. The current in this
line must be limited to 2/10 of an amp maximum. Exceeding this limit will damage the instrument. If this feature
is not used, leave this line open. Tie wrap this wire so it does not obstruct the freedom of travel of any controls.
8. Route the Fuel Flow Transducer Wires:
The wire harness includes 6' red, black and white wires bundled together. Route and connect these 6' wires
to the fuel flow transducer. If your engine is equipped with a fuel return line from the carburetor back to the fuel
tank, route these wires to the Fuel Flow Differential Module (FFDM-1). See the appropriate drawing at the back
of this manual.
Be sure the connectors mate properly. If the tab inside the male connector gets bent, it can wedge itself
between the red nylon and metal female receptacle. This can result in an intermittent connection after about a
month or more. If the connectors are disconnected several times the female connector can become loose. If this
happens use a pair of needlenose pliers and tighten the metal receptacle inside the female connector.
Rev. I: 7/2/02