No-frills Smart Bypass: Logic-controlled seven-lamp bypass

This chip-controlled and buffered relay array bypasses all the vehicle’s bulb-failure warning systems. On vehicles with complex lighting (modulated signals,two lamps on one wire,  etc.) and all vehicles with simple voltages supplying the rear lights, switching is accurate and efficient. It is quick and easy to fit, and very cost-effective. It bypasses all the vehicle’s bulb-failure warning systems.

Many cars send complex or modulated power signals to switch their rear lights, so making the towing relay work correctly is not simple. The smart bypass relay has built-in logic that measures the signals from the vehicle's lighting systems against exact criteria to determine which trailer lights should be switched on.

It gets the switching right every time. No chatter, no dim lights, just on and off as they should be.  The following two examples are common in cars.

a.   When the car uses a modulated power feed to make one single filament bulb perform the function of different lamps (e.g. brake and tail) the relay interprets the modulated signals and switches on the correct trailer lamps.

b.   When the car "swaps" bulbs in the event of a bulb failure, the relay again interprets correctly and keeps the correct trailer lights on.

              Added Value:

•  Simplest fitting: just fit and forget

•   Monitors the trailer flashers with both audible and terminal outputs

•   Maintains correct trailer lights even when car "swaps" functions if bulb fails

•  Totally transparent: the car does not detect it.

•  Quiescent current less than one milliamp 

•  Low cost

•  Fully snubbed against "spikes" and other hazards

•  Type-approved for EMC compliance

•  Protected: stands rough treatment, accidental current reversals, etc.

•  TF2217LOGIC-S is ready fitted with the new Multi-Splice connector

Part number: TF2217 LOGIC -S (with super splice) TF2217LOGIC-P (with plain signal wires)