LX470 trailer wiring - no volts (5 Viewers)

[brevitything]

Hi folks. So I have a 1998 LX470 that did not come with a hitch or trailer wiring. I bought a Curt receiver that included a 4-wire trailer plug and some kind of black box inline. Installed the receiver, now trying to get some trailer lights happening.

There is a plug on the OEM harness by the rear muffler that fits the Curt plug. I hosed out the connector with WD40 since it has 15 years of crud in it. Hooked everything up and attached the ground wire to the tub. No trailer lights with the key on acc and the parking lights turned on, truck lights are fine.

Tried to get a voltmeter reading and clean corrosion off of the OEM plug terminals, had trouble with the spare down there. So I dropped the spare and **** got real

I have no volts between any pins on that OEM plug with the truck lights on. I checked the other plugs back there on the OEM harness, but that one is the only one that the Curt plug fits, and the only unused plug back there. From what I have researched, the plug is by the rear muffler, which is where mine is. I did check the voltmeter by putting it across the battery, which read around 13VDC. So the meter is happy.

I then did some Google-fu and it seems like everything lines up with what I am seeing, in other words I am on the right track with the right connector. Also I read that the fuse is for all of the tail lights, including the trailer lights. So it doesn't seem like it would be a fuse. This jives with my previous experience running trailer lights on the Jeep and Chevy.

I did read that there are converter boxes in the rear tail light assemblies that can go bad, which would make the trailer light voltage not be there. Does this sound correct? Any info on this would be great.

Pics.

 

[Sandroad]

This is in the FAQs. Maybe it will help?

https://forum.ih8mud.com/100-series-cruisers/29687-towing-wire-harness-recall-98-99-a.html

 

[brevitything]

This is in the FAQs. Maybe it will help?

https://forum.ih8mud.com/100-series-cruisers/29687-towing-wire-harness-recall-98-99-a.html

Thanks Sandroad for pitching in! I did find that this evening. This is wierd though because there is no juice before my aftermarket converter box. I will keep researching. If I have to, I will splice in the wires to the harness.

 

[brevitything]

Just an update for anyone else trying to do the same thing, after reading the wiring schematics and testing wires laying under the truck for way too long, I gave up on using the factory harness plug to get trailer lights.

I ended up splicing into all but one of the wires back by the spare, just a little to the driver's side from center under the truck. I had to run a wire up into the passenger side turn signal hot wire on the tail light. With the converter box that I got with my hitch, the lights work peachy.

It was easy once I gave up on doing it the dupreme way, and just spliced it like you would on any truck.

 

[JustAHelpingHand]

Hello, I'm sure you have solved your issue by now but I'm going to post a link that I always refer back to whenever I start dealing with trailer wiring because I can never keep it straight. I hope this helps any in the future.
<a href='http://www.hitchanything.com/trailer-wiring-diagram-guide.html'>Trailer Wiring Diagram Guide</a></p>