trailer light wiring issue - 98 LX470 (1 Viewer)

[brevitything]

Hi Guys,
I put up a post on the 100 Series forum, but thought I would post up here as well. There are pics of the OEM harness plug in the thread over there:
https://forum.ih8mud.com/100-series-cruisers/777881-lx470-trailer-wiring-no-volts.html

Basically there is no voltage at the OEM harness trailer plug when the lights are on on the truck. From what I have read, the trailer light plug is on the same fuse as the truck lights, so it would not be a fuse issue.

I have read hints of a trailer light converter black box that would be located in the driver's side tail light housing. From what I understand, this box fails which allows the tail lights to function, but no trailer lights.

I have no evidence that this truck ever towed anything, there was 15 years of crud on the contacts on the plug, and I just installed the hitch receiver myself. So if there is a box in the housing, I don't know why it would fail if it was never used. But that is just my thinking out loud, I have no experience with such things.

Anyway I am about to just splice my trailer light plug into the OEM tail light wires so I can tow my Jeep with it in two days. This is my first Yota, so if anyone has some general Yota wiring insight into the situation it would be much appreciated. Specifically I am wondering about whether there is another relay on vehicles that came with the factory tow prep package, or a fuse somewhere, that kind of thing.

Thanks!

 

[Living in the Past]

Have you e er used the plug? Doesn't ook like a factory install to me. My 2000 100 series was much cleaner and had a metal bracket for the plug to mount on the back. I also don't think it shares the same fuse. I converted a 2001 Tundra to factory wiring for a trailer. Beside that four pin wirinf harness I needed to buy a relay box and a fuse to install by the battery. It was all plug and play but needed multible pieces. the fpur pin also won't work on yor LX with out a convertor. Brake and turn signal are separate bulbs. Four pin they share the smae lamp.

 

[brevitything]

Have you e er used the plug? Doesn't ook like a factory install to me. My 2000 100 series was much cleaner and had a metal bracket for the plug to mount on the back. I also don't think it shares the same fuse. I converted a 2001 Tundra to factory wiring for a trailer. Beside that four pin wirinf harness I needed to buy a relay box and a fuse to install by the battery. It was all plug and play but needed multible pieces. the fpur pin also won't work on yor LX with out a convertor. Brake and turn signal are separate bulbs. Four pin they share the smae lamp.

Hey sir, thanks for the response. No, my LX470 had nothing towing related on it at all, I just installed the receiver myself recently. My Curt receiver came with a converter box and a 6-pin connector that was supposed to plug into the factory harness near the rear muffler and spare tire. I have no volts on the oem harness there.

I agree with you, I don't think it is the same fuse either. On the 2004 100 series wiring schematic, it shows a 30A towing fuse, and two relays. My truck doesn't have any of that, so it must be only with the factory towing prep package.

From my digging around and tracing wires last night, I also agree that I need the converter to handle brake and turn signals. I pulled the jack holder out of the driver's rear cargo area, and pulled back the sheathing on the OEM harness back there. I also pulled both taillight housings. I think I have a good idea of what is going on, I was hoping to find all of the wires together by the jack holder. I traced back the driver's side lights which has the brake, tail light, and driver's turn signal wire. I then traced the passenger turn signal wire across, but I lost it when it went up into the quarter panel, I couldn't find it inside. Bummer because the rest of the wires I need are right there.

Since I did trace the passenger wire to the spare tire area on the harness, my new plan is to splice in there. I am going to verify that the wire is correct, than track down the driver's side wires there too. I am hoping I can just splice the wires in right there, zip tie the converter box down, and run the trailer wires down to the hitch. I found some wires that looked close to the right color/stripe, but they did not have a pulsing voltage when the turn signal was on. These trucks have a s*** ton of wires in them!

When I'm done I will post up pictures on my kind of build thread, so those who run into similar issues won't have to spend as much time hunting things down.

Peace man