TF111 Front monitor with LED indicator  

This monitor is very simple and reliable. Its design requires that a purpose-built LED indicator lamp should be supplied and used with it. (The LED panel lamp that comes with it has an additional resistor that is essentially part of the circuitry of the monitor) This unit's particular advantage is that it is designed to fit on the switch side of the flasher relay. It is also very compact and many fitters install it in the steering column, close to the flasher switch.

It has three wires for connection: power in (orange) connects in line from the
flasher relay, pin 49a; power out (grey) connects in line to the indicator switch; tell-tale (red) connects to the panel lamp. The panel lamp has a red wire that connects to the red wire from the monitor and a black wire that connects to earth. 

Its function is to measure the current coming out of the flasher relay to the flasher switch. When a trailer flasher lamp is operating in addition to the normal vehicle flasher lamps this monitor detects that the current is greater than a predetermined value and emits a signal in its tell-tale output wire that causes the panel lamp connected to the tell-tale wire to flash.
Refer to the General Instructions and Chart A in the section 12N Wiring before following these instructions


Locate existing vehicle flasher unit.
Identify feed from (terminal marked L or 49A on flasher unit) to indicator switch. Cut this wire a few inches away from flasher unit. Take relay orange wire and attach to cut wire leading to vehicle flasher unit; connect grey relay wire to other cut end. Connect red relay wire to red wire of L.E.D. warning light and black wire of warning lamp to earth.
Warning
This relay must only be used with L.E.D. warning light supplied.
     TF111  Front monitor with LED indicator
  
Panel lamp does not work:		   
Check all connections.
Check that all vehicle and trailer flasher bulbs are working.
Check that your earth is a genuine earth.
Check that you have connected the orange and grey wires in the correct sequence: orange towards the relay output pin 49a, grey towards the flasher switch. (If you have reversed them, you may have burnt out the monitor circuit.)
Check that you have connected the panel lamp lead to its matching-coloured relay lead.

Panel lamp works when no trailer or test board connected:
There may be more than two twenty-one watt and one five watt bulb on each side of the vehicle connected flasher circuit. If this is the case, the TF111 is not suitable. If you are not sure that this is the case, try another monitor of the same type. Sometimes the tolerances of the vehicle and the monitor coincide to cause an incompatibility. A new monitor may work on that vehicle.