Mazda CX-9 This larger SUV adds a V6 option, as well as more cargo room, to the CX-7 option.

Unidentified plug

Old Mar 8, 2026 | 09:17 AM
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Default Unidentified plug

Hello I am new to this forum also posted this on general tech as I saw there was more recent activity. I recently bought my wife a 2011 cx9 190k on it, car needed an alternator. I pulled the fan asssembly ended up replacing the radiator I have this plug I can’t figure out where it goes. I tried posting on Facebook cx9 forum but have been waiting days for approval. Thank you for any help in advance!!!!​​​​​​​


 
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Old Mar 8, 2026 | 09:51 AM
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Welcome to the forum

There aften extra plugs on the harness for accesories or other features that you Mazda did not come with? The question is what is not working on your Mazda?
The other way is using a volt/ohm meter and see if there is voltage both with the engine running and completely off.

BTW starting 2 threads as a new member does not get the answer an faster.

Unidentified plug - Mazda Forum - Mazda Enthusiast Forums
 
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Old Mar 8, 2026 | 10:08 AM
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Originally Posted by Callisto
Welcome to the forum

There aften extra plugs on the harness for accesories or other features that you Mazda did not come with? The question is what is not working on your Mazda?
The other way is using a volt/ohm meter and see if there is voltage both with the engine running and completely off.

BTW starting 2 threads as a new member does not get the answer an faster.

Unidentified plug - Mazda Forum - Mazda Enthusiast Forums
my apologies I’ll delete the other post that was my hope is that it’s an accessory plug I’m going out to check it with my meter today. Going to refill the coolant my fans never kicked on when I was bleeding it. Took it for a ride was holding temp fine but then one of the stock clamps was leaking I had to put a new hose clamp on and stupidly tried doing it when it was hot and ended up with two gallons of coolant on the ground. Thank you for your help

-tried to delete the other post not sure how just lets me edit-
also it’s a brown with a yellow stripe and black wire
 

Last edited by Calcagni952; Mar 8, 2026 at 10:12 AM.
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Old Mar 8, 2026 | 10:16 AM
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If you are patient and can read a wire diagram you can go online and get a wiring schematic of you exact year and model Mazda and find that plug and the possible use for it?

You can not delete threads on management of the forum can do that. You would need to request it via a PM to the moderator or admiration or use the report thread feature next to the green circle in your thread.
 
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Old Mar 8, 2026 | 10:25 AM
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Many Mazda" have these unused plugs. Here is one on my Mazda I just took the picture to show you.

 
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Old Mar 9, 2026 | 11:12 AM
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Thank you very much
 
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Old Mar 9, 2026 | 08:07 PM
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Default Here’s a photo from my 2012 CX-9

Originally Posted by Calcagni952
Hello I am new to this forum also posted this on general tech as I saw there was more recent activity. I recently bought my wife a 2011 cx9 190k on it, car needed an alternator. I pulled the fan asssembly ended up replacing the radiator I have this plug I can’t figure out where it goes. I tried posting on Facebook cx9 forum but have been waiting days for approval. Thank you for any help in advance!!!!




​​​​​​​hope these help!
 
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