Comment: Trailer Wiring Diagrams

I want clarification of the correct viewpoint for the colour layouts above. e. g. Re the caravan plug, are the diagrams showing the layout (A) when picking up the plug and viewing the connecting pins or (B) is it from the perspective of the cable going into the back of the plug. Would be good to have that highlighted at top of the article. I ask this as my van's 7 pin round plug when viewed as per (A) above, is colour coded as per the socket diagram. Not highlighting the correct perspective for the diagrams probably explains why a lot of trailors get wired up "backwards".
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Reply By: Bob Y. - Qld - Tuesday, Nov 19, 2013 at 19:04

Tuesday, Nov 19, 2013 at 19:04
Robb,

I've had the misfortune to have to change, or repair a couple of plugs lately, and using the diagrams on the Narva packet, I'd say you view from the "B" side.

That's what I did, and the lights came on, as required.

Bob



Seen it all, Done it all.
Can't remember most of it.

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AnswerID: 521730

Reply By: Member - Ian F (WA) - Tuesday, Nov 19, 2013 at 19:17

Tuesday, Nov 19, 2013 at 19:17
Hi Rob,
The plugs and sockets are usually numbered if you look carefully.
They are very hard to see.
Ian
AnswerID: 521734

Reply By: Ross M - Tuesday, Nov 19, 2013 at 22:39

Tuesday, Nov 19, 2013 at 22:39
All plugs of any worth have numbers and if wiring isn't right it isn't right.
Pins and colours and function assignment.

1. Yellow LH flasher/indicator

2 Reverse signal or aux power sometimes.

3 White, chassis/negative earth return of ALL trailer power through plug

4 Green, RH flasher/indicator

5 Blue, electric service brake

6 Red Stop light wiring to stop lights

7 Brown, Tail/marker lamps

If viewing into pins of the base on the trailer plug they are, in clockwise rotation
Yellow, Black, White, Green, Blue, Red and centre Brown

If looking into socket on vehicle they are, in clockwise rotation.

Yellow, Red, Blue, Green, White, Black, Brown centre.

I think Key slot is in line with Yellow or Green I just can't seem to remember that bit.

Think it is Green RHS just not sure. It's late,I'm tired. Thats my excuse so stickin' to it.

Cheers
Ross M
AnswerID: 521748

Reply By: dagree - Tuesday, Nov 19, 2013 at 23:30

Tuesday, Nov 19, 2013 at 23:30
Hi Robb1,
Hope this link helps. All colours and numbers are listed as viewing the cable entry end as per your (B) perspective.

Trailer Plug Wiring Diagrams
Cheers,
David
AnswerID: 521749

Reply By: Ron N - Wednesday, Nov 20, 2013 at 12:34

Wednesday, Nov 20, 2013 at 12:34
Robb1- All trailer wiring diagrams show the layout as per looking into the connection plugs from the coupling side of the male or female ends.

Cheers, Ron.
AnswerID: 521761

Follow Up By: Ron N - Wednesday, Nov 20, 2013 at 12:37

Wednesday, Nov 20, 2013 at 12:37
Oooops, my apologies - not all of them. Narva state "cable entry end" as per the previous posters link.
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FollowupID: 802562

Follow Up By: Ross M - Wednesday, Nov 20, 2013 at 14:53

Wednesday, Nov 20, 2013 at 14:53
Back or front it is still the same plug or base.

Number, Colour, Position, is all that is required, then if the plug is viewed from the front or the back or upside down or is a flat plug it doesn't matter a Rats, it has to be correct if the protocol is followed.
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FollowupID: 802572

Reply By: Rick S6 - Wednesday, Dec 18, 2013 at 05:50

Wednesday, Dec 18, 2013 at 05:50
Hi Robb,

I ran across this post and thought this guide might help. I had a similar question a while back and found this to be invaluable.

http://www.hitchanything.com/trailer-wiring-diagram-guide.html
AnswerID: 523234

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