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Topper 3rd Brake Light- Running Light

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Old Jun 26, 2025 | 05:49 PM
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Topper 3rd Brake Light- Running Light

I have a 2020 F350 SRW and just got the topper pictured. It has a third brake light. I found the 'brake' wire under spare tire, no problem. The topper brake light also has a 'running light'. Anyone have any good ideas on where to tap for the running light? I'm thinking the tail light, running light, would be the easiest. Thanks, Jeff

 
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Old Jun 26, 2025 | 06:05 PM
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From: MO
Originally Posted by jmfox3
I have a 2020 F350 SRW and just got the topper pictured. It has a third brake light. I found the 'brake' wire under spare tire, no problem. The topper brake light also has a 'running light'. Anyone have any good ideas on where to tap for the running light? I'm thinking the tail light, running light, would be the easiest. Thanks, Jeff
Not sure why you would need a high mount running light. I would say tap into one of the taillight power sources.
 
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Old Jun 26, 2025 | 06:54 PM
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Don't need it per se. The cap came with it.
 
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Old Jun 27, 2025 | 06:09 AM
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Originally Posted by T. Banning
Not sure why you would need a high mount running light. I would say tap into one of the taillight power sources.
I could see some of them coming with running lights up top, similar to a box truck. Heck my dad had a 1986 GMC dually that came factory with lights across the tailgate...the bulbs were always blowing whenever he slammed it too hard.

Is the wiring already present for the center running lights that come on some dually's? If that is already there, you could just tap into that. I don't know what the wiring for it looks like though, you'd need a schematic.
 
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Old Jun 27, 2025 | 07:21 AM
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https://www.ford-trucks.com/forums/1...2022-f350.html

Good information on this thread.
 
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Old Jun 27, 2025 | 09:40 AM
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That was most helpful 350Recon. Thanks!
 
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