| |
| TFC2: Single Fog cut-out relay |
 |
|
| |
|
This relay is designed to switch off the foglamp(s) of a towing vehicle when the foglamp of a towed trailer is on. The reason for turning off the vehicle foglamp is to avoid a distracting glare being reflected by the towed trailer, especially if the trailer is a caravan.
|
| |
| A fog cut-out relay is, in fact, a combined monitor and relay: the relay that switches off the towing vehicle's foglamp is switched by a monitoring circuit that operates when it detects current flowing through it to the trailer foglamp. The switched side is fitted in line in the vehicle foglamp circuit and the monitoring side is fitted in the cable going to pin 2 of the vehicle's trailer socket. It is necessary before fitting to cut the wire that supplies the vehicle foglamp. |
|
| TFC2 Fog Cut-out Relay |
| 
|
| 1. Wire the 12N socket according to Chart A and the instructions with the flasher relay or monitor you fit but do not connect the free end of the blue (fog lamp) wire in the 7-core cable. |
|
| 2. Carefully follow the instructions
above to complete the installation by adding the fog cut
out relay. |
|
| 3. Where the diagram shows that
you have to cut the vehicle's own wiring to install the
relay in line, connect the cut ends of the wires to the
appropriate screw terminals of the relay. |
|
| 4. The fog cut out relay will turn one or both of the vehicle's fog lights off if a trailer fog lamp is connected. When the trailer fog lamp is not present, the vehicle fog lights should work as normal. |
|
| 5. Use a suitable test board to test the circuits. Make sure the vehicle's fog light(s) and the trailer fog lamp(s) are working correctly and that no warning lamps are showing. |
|
| TFC2 Fog cut-out relay |
| |
Before fitting:
|
|
| |
| Check how many foglamps on the vehicle you wish to cut out. |
| |
| Check fuse-loadings to the vehicle's foglamp circuits to make sure one side can support two foglamps in case two are fitted to any trailer. |
| |
| If not, boost the system by introducing a bypass relay as shown below: |
|
| Boosting Fog Cut-out relays |
| It may happen that the trailer has more than one fog light and that you have to provide an independent power source for them to prevent overloading the vehicle's circuit. If this is the case, add in a single bypass relay (TF1011) as shown below. |
|
 |
|
| After Fitting: |
|
| Check all connections are well made. |
|
| Check connections have been made in the right sequence |
|
|
|
|
|
|
