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What is this under my dash?

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Old Feb 10, 2021 | 03:13 PM
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Default What is this under my dash?

Can anyone tell me what they think this might be under my dash? Just bought the vehicle. 03 2500 gas 5.7L

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Old Feb 10, 2021 | 05:46 PM
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Honestly don’t know, but I would say it’s aftermarket though. Could trace the wires to see where they go. Might be able to figure out what it’s for that way.
 
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Old Feb 10, 2021 | 06:43 PM
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It may be a brake controller. You can check for plugs under the rear bumper and see if there is continuity.
 
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Old Feb 10, 2021 | 09:38 PM
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IT's a five pin though.... aren't most brake controllers four pin? (you are likely correct though.....)
 
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Old Feb 10, 2021 | 11:37 PM
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Originally Posted by HeyYou
IT's a five pin though.... aren't most brake controllers four pin? (you are likely correct though.....)
Could it possibly be for a plow?
 
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Old Feb 11, 2021 | 11:03 AM
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Originally Posted by Ram316
Can anyone tell me what they think this might be under my dash? Just bought the vehicle. 03 2500 gas 5.7L

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Factory would have a more molded in look . It's fairly clean so yes, it might be for a brake controller. It could also be a performance installation for a tuner. Is that red dot a light or button, or both?
 
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Old Feb 11, 2021 | 01:24 PM
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It is a light and I have a separate brake controller that is next to it.


 
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Old Feb 17, 2021 | 01:40 PM
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I finally pulled the dash down and it is plugged here. I’m confused…





 
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Old Feb 17, 2021 | 01:56 PM
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It's a relay. Evidently someone added something that required one. Another poster mentioned a snow plow. Might be that or something else.
 
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