Trailer wiring

[chester Advanced Member Find all posts View Profile Close chester]

need some help giuys hooked up the trailer the other day and no lights put the tester into the plug and nothing not just 1 or 2 gone all connections dead.

Is there trailer harness on a sepaerate fuse to the rest of the lghts as all headlights etc work or any other tips would be appreciated

Thanks

[damonat Advanced Member Find all posts View Profile Close damonat]

i'm sure this was previously posted on.
will check it out, as too should you.

[plucker Advanced Member Find all posts View Profile Close plucker]

Check the earth as all of them have this in common.

[Guest Close Guest]

http://www.pradopoint.com/viewtopic.php ... ler+wiring

http://www.pradopoint.com/viewtopic.php ... ler+wiring

[damonat Advanced Member Find all posts View Profile Close damonat]

don't think it could be the earth, as it would use the towball as the earth to the vehicle.
maybe check if it's been connected.
silly statement, but it's possible a first year fitted the wiring :?

[waltec Senior Member Find all posts View Profile Close waltec]

Toyota install a set of relays in the back of the car to isolate the trailer wirirng from the car wiring, that way if the trailer has a fault it shouldn't affect the car.

There is a fuse in the engine bay that needs to be inserted to power up these relays, the first of Team Piggy's links talks about this fuse.

Matt

[Steve & Sandra Senior Member Find all posts View Profile Close Steve & Sandra]

we have problems with our trailer wiring in that the cruise control doesnt work properly. The trailer wiring is ok. And apparently the trailer wiring is correct as toyota have since checked with their plug tester. ??????????
it is a pain in the but on long drives.

[D4D-GXL Advanced Member Find all posts View Profile Close D4D-GXL]

don't think it could be the earth, as it would use the towball as the earth to the vehicle.
maybe check if it's been connected.
silly statement, but it's possible a first year fitted the wiring :?

Whao...! Damonat...It would not amaze me that some newbie appy may think like this.....and then charge you for their expert workmanship...(not). :shock: :shock:

Earth seems the most likely cause.

[mav Addicted PP Member Find all posts View Profile Close mav]

Strange as this may seem but Toyota have an active recall for Hi-Lux 4x4's for hazrd light problems when there is a bullbar and trailer hooked up. Here are the details:

Vehicle Recall Search Results for Toyota Hilux 4x4 (31 January 2005 - 31 August 2007)

--------------------------------------------------------------------------------
Problem: Hazard lights fail with bullbar and trailer
Make: Toyota
Model: Hilux 4x4
Variant:
Date Range: 31 January 2005 - 31 August 2007
VIN Ranges: see file
Status: Active
Defect: The extra indicator lights fitted in the bull bar overload the electrical hazard flasher system when the vehicle is towing a trailer.
Consequences: The hazard lights do not operate properly.
Corrective action: Toyota dealers will fit a special bullbar relay harness kit to vehicles fitted with a genuine Toyota bullbar.
Notif. Date: 16/10/2007
DOTARS No.: R07/138
Supplier Name: TOYOTA
Campaign No.: 7501K
************************************************** ***********


I wonder if our Prados are suffering the same sort of thing?

[clifton Advanced Member Find all posts View Profile Close clifton]

Hi Mav,
I have no problems with my old trailer incandesant lights, and new LED boat trailer lights.

[mav Addicted PP Member Find all posts View Profile Close mav]

Hi Mav,
I have no problems with my old trailer incandesant lights, and new LED boat trailer lights.

For the record neither do I. Just that the Hi-Lux recall is pretty specific about the configuration of the car so it may also occur in other Toyota 4x4's with certain configs.

I just thought it was interesting that there happened to be a recall out concerning trailer wiring and electrical problems on Hi-Lux cars.

[chester Advanced Member Find all posts View Profile Close chester]

It has worked fine for the last 3 years and just died. The plug has had a few dunkings so maybe off toa sparky.

I looked for the fuse but could not find anything marked trailer and all of my usual car lights cruise control etc work fine

[waltec Senior Member Find all posts View Profile Close waltec]

Well that is a first but hey, things happen! I have never investigated what circuit it actually powers up but you know there is an extra fuse to place under the bonnet though?

Not quite sure what you are saying / asking but on mine the extra fuse they added for the trailer indicators is in the fuse box behind the battery and is between the Radio and Door lock fuses. And to keep you looking there is no sticker or indication added to tell you the location.

The only hints to find it are that it is not listed under the cover in the descriptions and the installed fuse is different from all the OEM fuses (it doesn't have the rating on top).

As you can see in this post its not marked, by all your accounts it sounds like this fuse is blown, just replace it and see if that fixes it. Will save you $100 at the auto lecy!!!

Matt