lost backup beep and reverse lines
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Senior User
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From: MD
lost backup beep and reverse lines
Installed OPT7 tailgate light today using the following to hook up to trailer hookup: https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1, and https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1.
It is a nice clean install without splicing into any factory wires. Now I have lost the "beep" when in reverse and getting close to objects, and the moving lines when turning. Really do not care about the beeps, but do like the lines. I also get a message every time I go into reverse for the first time each drive that my sensors are turned off due to trailer being hooked up. The reason I went with this set up is because I was under the impression that I would not get this problem. Is there anything in forscan, or another method that I could make the lines come back. TIA
willie
It is a nice clean install without splicing into any factory wires. Now I have lost the "beep" when in reverse and getting close to objects, and the moving lines when turning. Really do not care about the beeps, but do like the lines. I also get a message every time I go into reverse for the first time each drive that my sensors are turned off due to trailer being hooked up. The reason I went with this set up is because I was under the impression that I would not get this problem. Is there anything in forscan, or another method that I could make the lines come back. TIA
willie
Laughing Gas
Joined: Oct 2013
Posts: 1,028
Likes: 21
From: MA
Your truck thinks that there's a trailer installed. It's very well documented on these vehicles that any additional draw on the trailer plug circuit causes the truck to think a trailer is connected. One of the side effects of this is that you lose reverse beeps and backup guide lines, because with a trailer attached you wouldn't use them anyway. Another effect would be the increased turn signal blink count when changing lanes. Anyway, your options are to cut and splice (yuck) or use the Magnum MFG harness which plugs in like with your reverse light harness, giving you the wiring you want without cutting and splicing. That's what most of us here have done. No FORScan fix, the unwavering fact is that anything on the 7-way or trailer circuit causes the truck to think there's a trailer. No way around it. Trailer plugs can no longer be used for accessory power.
Thread Starter
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Senior User
Joined: Dec 2019
Posts: 389
Likes: 3
From: MD
Your truck thinks that there's a trailer installed. It's very well documented on these vehicles that any additional draw on the trailer plug circuit causes the truck to think a trailer is connected. One of the side effects of this is that you lose reverse beeps and backup guide lines, because with a trailer attached you wouldn't use them anyway. Another effect would be the increased turn signal blink count when changing lanes. Anyway, your options are to cut and splice (yuck) or use the Magnum MFG harness which plugs in like with your reverse light harness, giving you the wiring you want without cutting and splicing. That's what most of us here have done. No FORScan fix, the unwavering fact is that anything on the 7-way or trailer circuit causes the truck to think there's a trailer. No way around it. Trailer plugs can no longer be used for accessory power.
I had heard about the magnum harness before, but thought it too plugged into the trailer hookup. That is my bad on that one, guess will be shopping for that one now.. what is another $100 ... Thanks NorEaster
Mountain Pass
Joined: Oct 2018
Posts: 121
Likes: 1
Your truck is seeing it connected to the trailer plug. It thinks there is a trailer connected and therefore has shut off the backup sensors and lines on the camera.
Installed OPT7 tailgate light today using the following to hook up to trailer hookup: https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1, and https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1.
It is a nice clean install without splicing into any factory wires. Now I have lost the "beep" when in reverse and getting close to objects, and the moving lines when turning. Really do not care about the beeps, but do like the lines. I also get a message every time I go into reverse for the first time each drive that my sensors are turned off due to trailer being hooked up. The reason I went with this set up is because I was under the impression that I would not get this problem. Is there anything in forscan, or another method that I could make the lines come back. TIA
willie
It is a nice clean install without splicing into any factory wires. Now I have lost the "beep" when in reverse and getting close to objects, and the moving lines when turning. Really do not care about the beeps, but do like the lines. I also get a message every time I go into reverse for the first time each drive that my sensors are turned off due to trailer being hooked up. The reason I went with this set up is because I was under the impression that I would not get this problem. Is there anything in forscan, or another method that I could make the lines come back. TIA
willie
Laughing Gas
Joined: Oct 2013
Posts: 1,028
Likes: 21
From: MA
Originally Posted by ocwill11
I had heard about the magnum harness before, but thought it too plugged into the trailer hookup. That is my bad on that one, guess will be shopping for that one now.. what is another $100 ... Thanks NorEaster
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Senior User
Joined: Dec 2019
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From: MD
I know, it's a pain. I have a Magnum on my truck, and the first several months I had my truck, the new Magnum harness didn't exist, so my truck had the ghost trailer for a long time. When I finally received the new harness on Christmas Eve before a 12"+ snow storm, you BET I was on my back in the driveway swapping it out. I also tapped into the harness for running light, reverse lights, and ground so I had clean access to those wires.
Laughing Gas
Joined: Oct 2013
Posts: 1,028
Likes: 21
From: MA
Originally Posted by ocwill11
So is there a wiring diagram with the harness. I get it Thursday. My light bar has brake, running, left, right, and reverse, so 5 wires...
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Thread Starter
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Senior User
Joined: Dec 2019
Posts: 389
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From: MD
Yup, should work perfectly. Here's the color chart for the harness. I believe it comes with a flat-5 connector on it these days.
Attachment 267877
Attachment 267877
Then that will make it easy, already have a flat 5 pin on it now, so I should be able to unplug the light, and plug it into the magnum harness. thanks...
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