Relay Guide | Essential Towbar Fitting Checklist

How many Trailer Sockets? How long should the cable be?
  How long should the cable be? (e.g. Transits require 2m.) 1.6m  2.0m
Will you fit Single Socket TF120  TF120A
Double Sockets TF122  TF122A
Which Flasher Monitor?
Will you fit a
Boot Fitted 
Audible Monitor? 
A standard rear audible monitor  TF1152
One with bypass ability  TF110R*
One with bypass ability  on ALL the road lamps (inc. flashers) TF2217 or TF2217U
Will you fit a 
Front Fitted
Audible or
Visible monitor?
A plug in easy fit Monitor Clone TF2100T*
A plug in easy fit Monitor Midwife TF2001*
A wire in type? Audible TF2005
A wire in type? Visible (LED) TF111
Do you need a Bypass Relay? If you do, which one is best?
Choose from single, three lamp, four lamp or seven-way. See Bypass Relays
Will you fit a Caravan Relay?
To switch the  fridge
and battery together?
A Self- switching Combination relay ? Screw Type TF1170 or TF1170X
An altenator-switched Combination relay ? Pin type TF116
An altenator-switched Combination relay ? Screw Type TF1171
To switch just
the fridge
or just the battery?
A single switching relay (30 amp) with self-switching trigger? TF1169  
TF1161+
A single switching relay (30 amp) with alternator switch feed? TF1161