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Discussion Starter #1
Ive been round and round trying to get the trailer lights to work. I confirmed the trailer lights work on a friends truck, all fuses in RL are good. Is there a relay or something else to check? What is the second plug coming out of harness that is not plugged in? Any help would be appreciated. Thanks
 

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2008 Ridgeline RTS in Billet Silver Metallic
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It would be helpful if you update your profile to show your location and year and model RL.

If this is a G1 RL, what wiring harness does your RL have? OEM or aftermarket?
 
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2006 Ridgeline RTS in Steel Blue
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I have a similar issue with my G1. They used to work but don't anymore.

I just haven't had time or inclination to spend more hours on it than I already have.

I've checked Fuses, Relays, The Harness in the rear of the Truck

I have the OEM harness and all the OEM parts installed except the brake controller *plug and obvious aftermarket brake controller.*

This issue may wait until I am back at shopping for a travel trailer. I've posted about this before in another thread or two
 

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A lot of issues related to trailer wiring is poor connections and/or breaks in the wires. It can be quite frustrating to track them down.
 

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2008 Ridgeline RTS in Billet Silver Metallic
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I have a similar issue with my G1. They used to work but don't anymore.

I just haven't had time or inclination to spend more hours on it than I already have.

I've checked Fuses, Relays, The Harness in the rear of the Truck

I have the OEM harness and all the OEM parts installed except the brake controller *plug and obvious aftermarket brake controller.*

This issue may wait until I am back at shopping for a travel trailer. I've posted about this before in another thread or two
Do you have a wiring tester and would this be helpful?

https://www.amazon.com/Vehicle-Trailer-Wiring-Circuit-Tester/dp/B0066CGLS6
 

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2006 Ridgeline RTS in Steel Blue
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Yes I have something like that. I'll have to find which one I got...

Here it is... IIT 7 Blade & 4 Pin Tester

And I have Brake Lights, just no running lights
 

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2008 Ridgeline RTS in Billet Silver Metallic
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Do you know how to check a relay for proper operation? (Hope I'm not insulting your intelligence!)
 

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2008 Ridgeline RTS in Billet Silver Metallic
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With no more to go on than what you've noted, my suggestion is to make sure you have a good ground on the trailer with the failed lights. A bad ground will cause all kinds of issues. If I understood your post correctly, your truck's wiring doesn't seem to be the problem since you could get a good connection on a different trailer. So check out the ground connection . . . now, back to my Chick-Fil-A . . . then go vote early!
 

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2006 Ridgeline RTS in Steel Blue
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Do you know how to check a relay for proper operation? (Hope I'm not insulting your intelligence!)
Absolutely no insult, I'm not an EE or an Automotive Electrician, I can read the diagram, but understanding it is entirely different...

This should tell you where to find the relays:

https://www.handa-accessories.com/ridgeline/hitch07.pdf

How to test relays:


I've got help this weekend and I will be doing this so should have updates soon....
 
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