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HOW TO: Connect a STANDARD SAE 4 pin harness (or 4 pin with backup lights) to your OLIVER FACTORY 7 pin wires

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If you have blocked your tail and brake lights for some reason, with a big cargo box for example, you need to add aux lighting to be safe and legal. I added an LED light bar here: ... https://olivertraveltrailers.com/forums/topic/6848-how-to-add-a-full-width-led-light-bar-to-your-bike-rack-when-your-bike-blocks-the-trailer-lights/

The factory wires are easy enough to access underneath the rear cargo floor, near the side door, but the colors do NOT match "industry standard" color coding. Not even close. This is based on my 2017 LE2, yours may differ. Oliver stopped providing wiring diagrams a few years ago, please complain to Sales!


I made this chart showing the differences. Why they did this is beyond comprehension.





This is from the lightbar thread, it shows the CableClam in the exact location of the left round red reflector. Be VERY careful drilling holes here ...


... because directly on the other side there are water lines and electrical cables:


To access the wires, remove the rubber floor sheet and the several tiny screws holding down the floor panel. Remove any cable ties, black electrical tape and peel away the protective split loom material. You will see some wire buses and also the two water ports and check valves.


My two larger buses each had a free spot, so I could just strip the appropriate wire and push it into place.




The other three wires had to be spliced directly into the Oliver wires. A little confusion here, the separate LED light bar Back Up wire was white, so it is important to keep track of the wire's purpose - function supersedes the actual color at all times!


AFTER testing to make sure all your lights work ....   OLIVER Bike Rack LED Light Bar Initial Test  .... reinstall the split loom and secure everything well with nylon wire ties. Don't forget the big bundles that run along the back wall, mine were completely loose. Double check your lights to make sure they still work. Put the floor and rubber sheet back in. Go have a beer.

I hope this helps. It is infuriating when colors do not match industry standards. ESPECIALLY IF YOUR TRAILER MANUAL HAS NO WIRING DIAGRAMS!!!

John Davies

Spokane WA


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"Mouse":  2017 Legacy Elite II NARV (Not An RV) Two Beds, Hull Number 218, See my HOW TO threads: https://olivertraveltrailers.com/topic/john-e-davies-how-to-threads-and-tech-articles-links/

Tow Vehicle: 2013 Land Cruiser 200, 33" LT tires, airbags, Safari snorkel.

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  • The title was changed to HOW TO: Connect a STANDARD SAE 4 pin harness (or 4 pin with backup lights) to your OLIVER FACTORY 7 pin wires

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