SMART LOGIC Bypass, TF2218/7E-P and TF2218/7E-S                             

These smart bypass relays fit virtually all cars, handle cars with standard or modulated (e.g. two lamps on one wire) circuitry, and have a low quiescent current. 

Interface to the car is via signal wires from the relay; interface to the trailer is via screw terminals.                                                          

Plug-in SMART LOGIC Bypass, TF2218/7EPIN with fog cut-out and “trailer aware” output.

With all the features of the TF2218/7E, this version has extra functionality: It can, if required, be fitted so that it cuts out the vehicle’s fog lights when a trailer is connected; it also has an output that goes live (+12V, protected) when a trailer is connected. This can be used, for example, to switch on a parking sensor cut out.