Trailer wireing

Submitted: Monday, Oct 08, 2007 at 10:19
ThreadID: 50344 Views:2423 Replies:4 FollowUps:5
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Right and left blinkers work OK. Brake lights work OK. But if i brake and use a blinker at the same time all the lights blink. I do have electric brakes. Any advice to try before i head to an auto electrician.
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Reply By: Member - Doug T (Qld) - Monday, Oct 08, 2007 at 10:23

Monday, Oct 08, 2007 at 10:23
Try this website , select the Plug/Socket type you have and check your wiring positions,
TRAILER WIRING CODES
.
.
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Follow Up By: Gone Bush (WA) - Monday, Oct 08, 2007 at 10:56

Monday, Oct 08, 2007 at 10:56
Hullo Doug,

I'm about to change my plug & socket from small 7 pin round to large 7 pin round.

Looking at that website makes me confused.

Do you know the difference, since there's no pictures, between LARGE 7 pin round and 7 pin round HEAVY DUTY. The wiring is different.

I have assumed, up until now, that small and large 7 pins have the same wiring. It's got me a bit flummoxed. (I try to use that word once a week).
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Follow Up By: Member - Doug T (Qld) - Monday, Oct 08, 2007 at 11:57

Monday, Oct 08, 2007 at 11:57
Gone Bush
G'day , I changed mine to the large plug/socket too, easier to work on,As for being confused , when you look at each set the top is for the socket and the bottom one is the plug , you now have to use your imagination and look at them as a mirror image because one will be reversed when you join them,
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Follow Up By: Gone Bush (WA) - Monday, Oct 08, 2007 at 16:45

Monday, Oct 08, 2007 at 16:45
I understand that part Doug, but look further down the page on that website and you'll see a HEAVY DUTY 7 pin round plug and socket mentioned.

That's the part I don't understand. The site mentions two types of 7 pin plug and socket: a LARGE and a HEAVY DUTY.

Do you know the difference?

cheers mate. (and cheers to Dusty too)
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Follow Up By: Member - Doug T (Qld) - Monday, Oct 08, 2007 at 16:55

Monday, Oct 08, 2007 at 16:55
Gone Bush
This website will show you the Heavy Duty, the one for you is these part No's 82181 and 82182 7 Pin Large Round Plastic Trailer Plug. Damn good website too
Trailer Plugs for Sandgropers ....Dusty says a WOOOOF and thanks but forget the sweet talk unless you got a Schmako.

Me and the boy
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Reply By: Member - Shane D (QLD) - Monday, Oct 08, 2007 at 10:46

Monday, Oct 08, 2007 at 10:46
Sounds to me like an earth problem, The earth you have can run a coupla lights but when you load up with power, the earth has to be equal to the task, if not, electricity makes it way where it can.
the trailer plug would be a good place to start ( both trailer and vehicle).
Got a mate with a trailer? try his trailer, this may help with the process of elimanation, use his vehicle to see if same result.
pull off both light lenses and check for corrosion around wires/earth points, often these probs are easily identified, If you are able to spare half an hour having a look around.
Cheers, Shane
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Reply By: Mikee5 (QLD) - Monday, Oct 08, 2007 at 11:21

Monday, Oct 08, 2007 at 11:21
Shane is right, it is almost certainly an earth wire fault. Check that first by tracking all earth joints and contacts from the car end right back to the lights. Good luck though, earth faults can be caused by slight corrosion around contacts and may not be obvious.
Mike.
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Reply By: neilscott63 - Monday, Oct 08, 2007 at 12:15

Monday, Oct 08, 2007 at 12:15
Hooked up the box trailer and it did the same thing. Checked the wires and noticed that they had attached the earth wire(white) to the black wire(auxillar) when installing the tow hitch. Connected earth wire to earth wire and problem is now fixed. Won't mention the name of the auto part shop at Glendale that installed the bar.
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Follow Up By: Member - Mike DID - Monday, Oct 08, 2007 at 14:59

Monday, Oct 08, 2007 at 14:59
The installer must have been distracted because it was done just before knock-off time

- or just after lunch

- or just before tea break

- or a couple of hours before lunch

- or . . . . .
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