I have taken the cover off the 7 pin plug and tried connecting a 12v battery across the black earth terminal and all the other terminals one by one. The only lights coming on are the LH roadlights, which come on with all the terminals.
OK, we are getting somewhere at last. The wiring does not follow any wiring diagram I have found.
So, using the white as earth (from a video on Youtube), have gone around the terminals to see what comes on. We have :-
1 LH indicator
2 Brakes
3 assumed to be earth
4 RH indicator
5 RH roadlights plus number plate
6 same as 5
7 LH roadlights
I will swap the wires 2 to 6, 6 to 5, 5 to 2 and see if that does it.
I have had the caravan 2 years and thought everything was OK. I have not driven it in the dark so perhaps never realised things weren't happening correctly as when I pressed the footbrake the rearlights came on - my wife and son have been checking the lights before we move off and would not have noticed the actual brakelights weren't coming on.
Pin 1 Yellow LH Indicator
Pin 2 Blue Fog Light
Pin 3 White Earth
Pin 4 Green RH Indicator
Pin 5 Brown RH Tail light
Pin 6 Red Stop lights
Pin 7 Black LH tail light and number plate.
Quote: Originally posted by Rob and Tina on 12/9/2018
The 7 pin should be as follows:
Pin 1 Yellow LH Indicator
Pin 2 Blue Fog Light
Pin 3 White Earth
Pin 4 Green RH Indicator
Pin 5 Brown RH Tail light
Pin 6 Red Stop lights
Pin 7 Black LH tail light and number plate.
Hope this helps.
Good luck.
Rob
Many thanks for that Rob but it looks like the diagram I started with which doesn't work with this caravan. Anyway, I have moved things around and it all works now.
Pins 1, 3,4,5,6,7 have stayed the same for years, Pin 2 has changed many times.
Vac brake warning light.
Inside light.
Reversing light.
Rear Guard fog warning.
I have never worked out why left and right side/tail lights were split, OK today split on the car, but late 1950's early 1960's when first we started to use the 7 pin plug cars only had one side light supply anyway.
So in the early days it was common to use the centre pin for other things.
Today we have the same with second 7 pin plug, reversing light pin 1 but the next 6 I have seen swapped about. People wanted two ignition feeds, and there are enough pins for three feeds, even if only two feeds are allocated.
Loss of a pin with 13 pin socket has resulted in many now towing the line and following the official (BS7671) wiring diagram.
Quote: Originally posted by ericmark on 13/9/2018
Pins 1, 3,4,5,6,7 have stayed the same for years, Pin 2 has changed many times.
Vac brake warning light.
Inside light.
Reversing light.
Rear Guard fog warning.
I have never worked out why left and right side/tail lights were split, OK today split on the car, but late 1950's early 1960's when first we started to use the 7 pin plug cars only had one side light supply anyway.
So in the early days it was common to use the centre pin for other things.
Today we have the same with second 7 pin plug, reversing light pin 1 but the next 6 I have seen swapped about. People wanted two ignition feeds, and there are enough pins for three feeds, even if only two feeds are allocated.
Loss of a pin with 13 pin socket has resulted in many now towing the line and following the official (BS7671) wiring diagram.
Fortunately I have a small 12v battery to hand which made it very easy. with the help of my lad, to connect each pin in turn and see what did what.
I am trying to forget that I towed it for 2 years with faulty lights!
Its well worth having a 13 pin tester. The one I have has a long lead so I can plug it in and still test everything sitting the drivers seat. This helps to isolate any fault within a minute or two either to car or van
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Topic: No Brake Lights on Caravan
