General Technologies FF310 User Manual
User’s Handbook
FF310
Electrical Circuits
FaultFinder
Table of contents.
1 - Check out list
1 Check Out list Page 1
2 Start-up Page 1
3 Switching On and Off The FF300 Page 1
4 Setting the sensitivity level Page 2
5 How to use the probe Page 3
6 Locating Short Circuits Page 3
7 Wire tracing Page 4
8 Locating Current Leaks Page 4
9 Locating Open Circuits Page 5
10 Wire Identication Page 5
11 Hook Up Reference Chart Page 6
12 General Procedures Page 7
13 Special Tracing Procedures Page 8
14 Technical specications Page 11
15 CT8002 Circuit Tester Page 12
16 CT6100 Fuse Socket connectors Page 12
17 Care of the unit Page 13
18 Warranty Page 13
Caution
Very Important: Read this rst
The FF310 set consists of:
FF310R FaultFinder receiver.
FF310T FaultFinder transmitter.
CT8002 Circuit tester
CT6100 Fuse socket adapter set
Factory supplied 9- volt alkaline batteries, type Duracell MN1604
Foam padded polypropylene carrying case.
User’s handbook.
2 - Start Up
Both the FF310R and FF310T are factory supplied with batteries. To install the batteries
follow the steps below:
1. Op en ba ttery drawer at bac k of ea ch un it ( fa cto ry su ppli ed ba tte ries
are disconnected).
2. Remove the battery, and connect it observing the polarity of the battery connector,
repeating the operation on both units.
3. Press the On/Off button on the FF310T (FaultFinder Transmitter), green LED will
start ashing. If green LED does not starts ashing, check the battery polarity and
reinstall if necessary. To turn the unit off, press the On/Off button again.
4. Press the On/Off button on the FF310R (FaultFinder Receiver), green LED will
turn on. If the green LED does not turn on, check the battery polarity and reinstall
if necessary. To turn the unit off press the On/Off button again.
• For use only with DC voltage. Do not connect to circuits exceeding 42 volts DC under
any circumstances.
• DO NOT USE on AC voltage.
• Do not use on any circuit directly or indirectly connected to AC lines or any other AC
power source.
• Do not use with any component or part of the ignition system.
• Before using this device check the vehicle’s electrical wiring and disconnect any part
or subsystem sensitive to voltage and current pulses such as air bags, electronic
control modules, etc.
• Always follow the instructions and procedures indicated in the vehicle’s
service manual before attempting to disconnect any part or subsystem of the
electrical circuit.
Exceeding the limits listed above when using this apparatus, or not observing
the precautions listed above can expose you to physical injury and permanently
damage your instrument and parts and components of the vehicle under test.
“V Ready” and “GTC” are registered trademarks of General Technologies Corp.
3 - Switching On and Off the FF310 set
The FF310T
FaultFinder Transmitter is turned on and off by momentarily pressing the “ON/OFF”
button, and it must be turned off manually after use by pressing the On/Off button. Before
storing the unit check to make sure that all lights are off, failure to do so will result in a
much shorter battery life.
The FF300R
FaultFinder Tracer can be turned on and off manually by momentarily pressing the “On/Off”
button, however after 3 minutes of not being used, it will turn off automatically to conserve
battery power. Turning the unit off manually will prolong battery life.
Low Battery indicator
From time to time the batteries on both units will need to be replaced. When the battery
is below the minimum operating voltage, upon turning the unit on (FF310T and FF310R)
both lights will ash for 1 second and the unit will turn off automatically. In this case replace
the batteries with a new set of 9 Volt alkaline batteries. To install the new batteries, follow
the instructions in the preceding section: 2 – Start Up.
Page 1
4 - Setting the sensitivity level
The FF310R has three user selectable sensitivity ranges: ‘Low’, ‘Medium’ and ‘High’.
These ranges allow the technician to choose the degree of sensitivity most suitable to
the particular detection being performed.
4.1 Checking the current sensitivity setting:
The FF310R’s current sensitivity setting is displayed when the “ON/OFF” button is pressed
for 2 or 3 seconds while the unit is ‘ON’ (steady green indicator on). The high sensitivity
setting generates a quick triple ashing of the green LED, a double ashing in the medium
sensitivity range and a single ashing indicates a low sensitivity level setting.
Green LED shows a: FF300R Tracer set to:
5 - How to use the probe:
The probe of the FF310R is built of coiled steel and can be bent as needed, in order to
reach wires in congested or difcult areas. Depending on the circuit characteristics and
the sensitivity setting, the probe will pick-up the signal from the wire in a wide range of
positions . However for the best possible range the FF310R’s probe tip (yellow cap) should
be positioned perpendicular ( at 90°) to the wire being traced and either above or below
it, as shown in Fig. 1 below.
Single (1) ash and beep Low sensitivity
Double (2) ash and beep Medium sensitivity
Triple (3) ash and beep High sensitivity
When turned off, the FF310R will retain the last selected sensitivity setting.
4.2 Procedure to select the FF310R’s range :
1. Unit sh o u l d be on, if n o t , turn it on b y momentarily pr e s s i n g the
“ON/OFF” button.
2. Press and Hold “ON/OFF” button for approximately 3 seconds until a beeping and
ashing occurs. This initial beeping and ashing indicates the current sensitivity
level setting. By holding the “ON/OFF” button pressed, the FF310 will cycle to the
next sensitivity setting following the pattern indicated below:
I- Low Sensitivity: single (1) ash and beep.
II- Medium Sensitivity : double (2) ash and beep.
III- High Sensitivity : Triple (3) ash and beep.
The sensitivity level is selected in the following sequence:
LOW MEDIUM HIGH
Sensitivity Adjustment Sequence
For example: If the FF310R unit is set to ‘MEDIUM’, in order to set the sensitivity to LOW,
press the “ON/OFF” button until a double beep and ashing occurs (current
setting), keep holding the button pressed and a triple beeping and ashing
occurs (setting now is HIGH), keep holding the button pressed, until a single
ash and beep indicates that the new setting is LOW.
Fig. 1 - Probe positioning
6 - Locating Short Circuits
Refer to the Hook Up Reference Chart in Page 6.
6.1 Observe the limits and safety precautions at all times (refer to the beginning of
this handbook).
6.2 Connect the FF310T (transmitter) in series with the short-circuited wire, making sure
one of the unit’s clips is connected to the circuit’s positive supply (or vice versa for
vehicles with positive supply connected to chassis). A fuse socket connector (in place of
the blown fuse), a connector, etc., provides a convenient hook-up as shown in Fig. 2 and
Fig. 3 in Page 6.
6.3 Switch the transmitter on by pressing the On/Off button and observe if the Red LED
on the FF310T starts ashing. If not check connections, power supply, and in the
case of having connected the unit to any place other than the fuse socket, check
that the circuit’s fuse is installed and in working condition (not open). If necessary
replace with a new fuse with the same ratings.
6.4 Switch the FF310R (tracer) on, and if green LED is turn on.
6.5 Ver ify tha t th e FF 310 R is set to th e lo w se nsi tivity lev el (sin gle gre en
LED Flash).
6.6 Slowly sweep the wire, conduit, etc., with tracer, ensuring the tracer’s probe is
perpendicular and above or below the wire being traced and as close as
possible to it .
6.7 Follow the wire or check it at different points, starting from the transmitter and moving
towards the load (accessory, light , etc.) observing the positioning of the probe as
indicated above. Continue this procedure while the audio signal (beeping sound) and
visual signal (ashing Red LED light) indicates the integrity of the circuit. If beeping
and ashing slows down or stops it indicates that the probe is either moving away
from the faulty wire or it has passed beyond the short circuit point.
6.8 If difcult or impossible to get the FF310R Tracer to pick-up any signal, then adjust
the sensitivity to HIGH, and check again if a signal is received.
6.9 Double check positioning the probe before and after the suspected place. If the short
circuit point has been found, the audio/visual indicators will show circuit integrity on
for one position, but not for the other.
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