Trailer Lights Not Working

[casqui45]

This is my first post. I have a 2007 CX-9. We purchased it new with the towing package and the wiring for the trailer lights came with it. About 4 months ago, the trailer lights stopped working. I used a tester on the Mazda's wiring harness and am not getting power. Is their a fuse for it? If so, where is it? I checked the fuses under the hood and in the glove box and don't see anything marked for the towing lights.

Thanks

 

[ceric]

You need to trace the wirings to see where they connect to.
Newer models of AWD are pre-wired from factory.
Older ones like yours were not. They could be wired in many ways.

 

[mymmeryloss]

Trace your wires. Either your power wire got too hot and burned through or a connection came loose. If u check continuity in ohms u can figure out where ur bad spot is with a little simple math.

Was ur ground good?

 

[casqui45]

The ground looks fine, but I haven't traced the wires from the hitch location. I'm going to try that today. Thanks

 

[table5511]

I thought I remembered seeing a post on here awhile back and someone posted a pic of the plug-in location for 07/08 ish models, and I think it was under the spare tire area somewhere. Perhaps the connector got "unplugged."

 

[smittypig24]

Did you ever find an answer to this? My lights just stopped working and I'm sure it's the fuse...but my hitch wiring goes into the main wiring harness and I don't know which fuse it's connected too! Anyone know which fuse it shares with??

 

[bill42]

bump.
My trailer lights just stopped working too all at once, with 2008 factory hitch. Wondering if there is a fuse anywhere. I see a weird balast looking thing under the hitch mount. I wonder what that is and if it burned out.

 

[Kenundrum]

I had this happen to me and I was able to figure it out last week. There is a fuse in the panel under the hood on the driver side that controls the trailer wiring and the rear cargo area 12v socket. I believe the fuse is 15A in position 20 labeled OUTLET RR or something along those lines.

 

[bill42]

Hey thanks for this info!!! I see you have a 2008 like me so I have my hopes up that this will fix my problem. I had found a PDF for 2009 and later CX-9's that shows a dedicated 15A fuse in the glove box for trailer lights. I have the slot on my 2008 but it is empty, so I was wondering where the fuse would be for my 2008. I will check this out tonight. If it fixes the problem this board has payed for itself!

 

[bill42]

Yup, that was the problem. I think I backed my trailer into the water and the waterproof taillights leaked a bit and shorted out the fuse. Thanks Kenundrum!
Finding out which fuse on my 2008 is connected to the trailer hitch harness was the key to fixing my broken circuit.