Upfitter switches
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5th Wheeling
Joined: Mar 2021
Posts: 46
Likes: 31
From: Tacoma & Westport WA
Upfitter switches
Upfitter switches. I have them in my 2022 SD that has the diesel. Wanted to use a switch to supply power to a rearview mirror type of monitor for my trailer camera. Supplied wires/adapter was too short to reach the cigarette receptacle in center console.
Anyway I got into the wiring at the relay/fuse box in the engine compartment finding the blanked off wires for aux switch wiring. I also found the 4 pass though wires. Butt spliced the brown wire which is supposed to be for switch 4. Butt spliced the power supply for the camera what would step down 12v to the camera voltage to the pass through wire in the cab. Same color coding as the wire I used in the engine compartment. Thinking this is easy but Ford could have left a bit more length on the wires.
System works, camera monitor comes on when I start the truck. What's weird is the switch does nothing. IE I can't turn the camera monitor off with the aux switch. It always has power when the engine is on regardless of switch position. Any ideas what's going on here or what did I do wrong???
Anyway I got into the wiring at the relay/fuse box in the engine compartment finding the blanked off wires for aux switch wiring. I also found the 4 pass though wires. Butt spliced the brown wire which is supposed to be for switch 4. Butt spliced the power supply for the camera what would step down 12v to the camera voltage to the pass through wire in the cab. Same color coding as the wire I used in the engine compartment. Thinking this is easy but Ford could have left a bit more length on the wires.
System works, camera monitor comes on when I start the truck. What's weird is the switch does nothing. IE I can't turn the camera monitor off with the aux switch. It always has power when the engine is on regardless of switch position. Any ideas what's going on here or what did I do wrong???
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5th Wheeling
Joined: Mar 2021
Posts: 46
Likes: 31
From: Tacoma & Westport WA
Yup that's what it seems like to me also. A wire that was hot. I went by the tag on the wire bundle. Brown which is one of the wires coming out of the relay/fuse box is supposed to be switch #4. Pass through wires weren't attached to any wire on each end. Butt spliced the positive to the pass through and attached the ground to a ground that was on the frame. I'll have to chase the wires tomorrow. Like an idiot I didn't put a meter on the wire I used to see if it was actually #4.
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Joined: Nov 2005
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Yup that's what it seems like to me also. A wire that was hot. I went by the tag on the wire bundle. Brown which is one of the wires coming out of the relay/fuse box is supposed to be switch #4. Pass through wires weren't attached to any wire on each end. Butt spliced the positive to the pass through and attached the ground to a ground that was on the frame. I'll have to chase the wires tomorrow. Like an idiot I didn't put a meter on the wire I used to see if it was actually #4.
Lead Driver
Joined: Nov 2005
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Well, just checked my OM and you're right, solid brown is #4, the only one that uses a solid color!
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Lead Driver
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Not for 2022 apparently.
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Lead Driver
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Thread Starter
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5th Wheeling
Joined: Mar 2021
Posts: 46
Likes: 31
From: Tacoma & Westport WA
I'll tear into again in the morning. Dang it I'll have to run down to the local marine supply store to get some more heat shrink butt connectors for that wire size.
Lead Driver
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Yup it did match up on the tag and the owners manual. It isn't powered until the ignition is on. Switches 5 & 6 I think can be powered with the ignition off if you switch the small fuse in the box forward but 1 thru 4 shouldn't have that option.
I'll tear into again in the morning. Dang it I'll have to run down to the local marine supply store to get some more heat shrink butt connectors for that wire size.
I'll tear into again in the morning. Dang it I'll have to run down to the local marine supply store to get some more heat shrink butt connectors for that wire size.
This might be more accurate, you'll have to verify...
Lead Driver
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Pretty close to matching the table above, except for aux 3, that appears to have a typo in the table (/BN instead of /GN). I wonder why the label on the OP's harness says BN for relay 4. As if the owners manual being wrong wasn't enough, slap the wrong label on too, to really confuse people.
