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Go Back   TDIClub Forums > VW TDI Discussion Areas > Upgrades (non TDI Engine related)

Upgrades (non TDI Engine related) The place of handling, lighting and other upgrades that do not relate to the performance or economy of the TDI engine. In other words upgrades to your TDI that don't fit into TDI Fuel Economy & TDI Engine Enhancements.Please note the Performance Disclaimer

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Old May 6th, 2015, 10:14   #46
SFHGolfTDI
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Originally Posted by romad View Post
I ended up using this one: Curt 56146 SMD Trailer Wire Converter It is now about $7.50 cheaper than when I bought it in March 2013 and is now cheaper than the other one. Oh, the reason I went with the 56146 is in post#14 above.
Thanks. And for the lighter plug, any quality ones you know of, or just one of the cheapo ones off eBay or Amazon? Also, I suppose the internal fuse should also have enough amps to cover the adapter?
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Old May 6th, 2015, 10:26   #47
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Originally Posted by SFHGolfTDI View Post
Thanks. And for the lighter plug, any quality ones you know of, or just one of the cheapo ones off eBay or Amazon? Also, I suppose the internal fuse should also have enough amps to cover the adapter?
I just picked one up at my FLAPS (O'Reilly's to be exact). As for fusing, IIRC, I added up the total wattage of all bulbs on the trailer then divided by 12 volts to get the current. So two 1157 bulbs @ 27/8.3 watts each plus two 5w wedge bulbs gave me 80.6 watts total. Dividing by 12 gave me 6.72 amperes current so a 10 ampere fuse was required.
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Last edited by romad; May 6th, 2015 at 10:43. Reason: Removed redundency.
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Old May 6th, 2015, 12:50   #48
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I just picked one up at my FLAPS (O'Reilly's to be exact). As for fusing, IIRC, I added up the total wattage of all bulbs on the trailer then divided by 12 volts to get the current. So two 1157 bulbs @ 27/8.3 watts each plus two 5w wedge bulbs gave me 80.6 watts total. Dividing by 12 gave me 6.72 amperes current so a 10 ampere fuse was required.
And you're talking about the fuse already in the cigarette lighter adapter, right? Not a separate in-line which would be redundant?
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Old May 6th, 2015, 12:59   #49
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Correct. I think the adapter came with a 5 amp fuse which I replaced with the 10 amp one.
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Old May 18th, 2015, 14:51   #50
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So, I purchased an MK3 trunk wiring harness (like the one mentioned earlier in this thread) for $21 on eBay to save a few $$ on the connectors and repair wires. I ended up buying the Hopkins 46365 Short Proof Power Converter because it seems a little more robust/reliable than the Curt with better protection and better reviews. I don't need all the extra wiring and parts, but I'd rather only do it once. I'm going to cut the connector end off this cigarette lighter adapter which comes with a 15 amp fuse and is very nice quality (blue led is a good match for MK4 cluster lights--not that this matters in the trunk ). Unlike Herm & Romad, I'm thinking of connecting both the ground and the 12V+ to the power adapter since both wires on the adapter are going to go to the other side of the cargo compartment anyway (any downside to this?).

I'm hoping to have a weld shop make my hitch in the next week or two, then I'll make the wiring harness and get it all hooked up. Will report back!
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Old June 3rd, 2015, 15:02   #51
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Got a custom hitch made for $294 locally. Spent about half the day there and then came home and cut the bumper. Didn't have a chance to work on the electronics. You can see the final product here: http://forums.tdiclub.com/showthread.php?t=441438
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Old June 21st, 2015, 12:08   #52
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How it all turned out with final install & pics: http://forums.tdiclub.com/showpost.p...6&postcount=19

Thanks HermTDI for a great post.
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Old June 17th, 2018, 20:09   #53
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Where are people ordering their connectors and repair wires from nowadays? I can't seem to find a place that has them for sale.
Any help would be much appreciated.

Edit: Just found out that ECS Tuning has everything in case anyone was wondering.
Repair Wire
Three Pin Connector
Single Housing
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Old June 17th, 2018, 21:14   #54
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Quote:
Originally Posted by 3L3M3NT View Post
Where are people ordering their connectors and repair wires from nowadays? I can't seem to find a place that has them for sale.
Any help would be much appreciated.

Edit: Just found out that ECS Tuning has everything in case anyone was wondering.
Repair Wire
Three Pin Connector
Single Housing
When I needed some, I just ordered them from a dealer. Of course, you need the VW part numbers first and those can be a bear to find.

I checked the ECS website and just searching for the phrase "repair wires" gives you 2 pages worth, while the phrase "VW connectors" gives you several pages of connectors.
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1990 Mazda Miata (bought July 1989)

Last edited by romad; June 17th, 2018 at 21:19.
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Old May 31st, 2020, 08:58   #55
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Non-TDI, but I picked up a 2003 MK4 wagon 2.0 gasser, and the tail light plugs seem to be different than what’s pictured here. Anybody by chance able to tell me which pins are which for the wiring?
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Old May 31st, 2020, 13:14   #56
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Non-TDI, but I picked up a 2003 MK4 wagon 2.0 gasser, and the tail light plugs seem to be different than what’s pictured here. Anybody by chance able to tell me which pins are which for the wiring?
Should be the same as the taillights are what is used on the MKIV wagon unless a PO put in custom lights. For the wiring check your Bentley Manual Volume 2. Can you take a clear picture of one of the taillight bulb housing?

Herm TDI's graphic in Post # 1 gives you the pinout but doesn't break down the RF/NES connector. This is for the backup lights and the rear fog light. There is only 1 fog light bulb and that goes in the outside position of the driver's side taillight assembly; the 2 backup bulbs go in the inside position in both taillight assemblies.
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Last edited by romad; May 31st, 2020 at 13:36.
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Old May 31st, 2020, 18:29   #57
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Forced myself to wire a powered converter today following the pinout in post one, using the fire extinguisher strap above the amplifier to hold the converter in place. Finally got everything working except left tail light on trailer. Consequently it seems, I have no power on vehicle right tail light but the trailer right tail light works.
The converter box is on driver side. The trailer tail light wire is plugged into the driver's side tail light. I ran power from the outlet in the trunk on the passenger side, and grounded into passenger tail light upstream of the converter box and downstream of the converter box into the driver's side tail light.
No power in the passenger side tail light, and call it a day.
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Old June 1st, 2020, 07:43   #58
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Originally Posted by romad View Post
Should be the same as the taillights are what is used on the MKIV wagon unless a PO put in custom lights. For the wiring check your Bentley Manual Volume 2. Can you take a clear picture of one of the taillight bulb housing?

Herm TDI's graphic in Post # 1 gives you the pinout but doesn't break down the RF/NES connector. This is for the backup lights and the rear fog light. There is only 1 fog light bulb and that goes in the outside position of the driver's side taillight assembly; the 2 backup bulbs go in the inside position in both taillight assemblies.
I figured they would be the same as well, but the plugs are in different locations, and labeled a little different. From what I can tell, the sedan bulb holder is different than that of the wagon. I don't have a Bentley manual, or I'd look in there. The three prong connector on mine doesn't have a "BL" listed in the center, but rather, has a separate 2 prong plug beneath the main connector that is labeled "BL". Here's some pictures.


Driver side:




Passenger side:


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Last edited by samuraitd; June 1st, 2020 at 07:48.
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Old June 1st, 2020, 08:30   #59
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OK, you are correct and I was wrong. I went out and popped one of mine and it is the same as yours. The wiring is the same; it is the physical positions of the 3-pin and two 2-pin tap off connectors that are different but the latter isn't used. Just follow the wiring for the 1-pin and 3-pin connectors.

Edit. You should confirm where the turn signal position is in your assembly. IIRC, my stock assemblies had the turn signal and tail light positions reversed from the diagram in post 1. When I installed the EU/UK assemblies with the amber turn signal, I had to swap the BL and S wires on the incoming 6-pin connector on both sides. I think the diagram in post one shows the way the lights are used in the EU/UK.
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2004 Toyota Prius (bought August 2004)
1990 Mazda Miata (bought July 1989)

Last edited by romad; June 1st, 2020 at 08:47. Reason: Turn signal position confirmation
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Old June 1st, 2020, 10:13   #60
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Originally Posted by romad View Post
OK, you are correct and I was wrong. I went out and popped one of mine and it is the same as yours. The wiring is the same; it is the physical positions of the 3-pin and two 2-pin tap off connectors that are different but the latter isn't used. Just follow the wiring for the 1-pin and 3-pin connectors.

Edit. You should confirm where the turn signal position is in your assembly. IIRC, my stock assemblies had the turn signal and tail light positions reversed from the diagram in post 1. When I installed the EU/UK assemblies with the amber turn signal, I had to swap the BL and S wires on the incoming 6-pin connector on both sides. I think the diagram in post one shows the way the lights are used in the EU/UK.
Sounds good, I'll have to get a test light to check it out. Thanks for your help!
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