Does Battery Need to be Disconnected to Install Tow Ready Trailer Wiring on a 2015 Toyota RAV4

Question

Question:

Is it necessary to disconnect the battery to install this wire harness? If so, will this have any effect on the car electrical system?

asked by: Dan G

0

Expert Reply:

Step 11 of the trailer wiring harness part # 118578 that you referenced indicates that you have to disconnect the negative post of your vehicle's battery temporarily. You would lose some radio presets doing this but nothing permanent would get damaged. On the other hand, if you were to leave the battery connected there is a chance you COULD damage the electric system or get shocked yourself.

I attached an install video for you to check out as well.

expert reply by: Jameson C

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Answer 1

It is always a good idea to disconnect a battery terminal before installing any electrical device, including a wiring harness, on any vehicle. It is likely that our video team just edited that specific step from the video. Since Curt 4-pole harness…

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Answer 2

for your 2013 Toyota RAV4 we offer three wire harnesses. To reduce the trailer lights power draw on the wiring system in your RAV4 a powered converter is required when installing a trailer wiring harness like part #118578. The installation is…

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Answer 3

It is possible that an error in the BCM could cause problems with the brake controller. Usually when a brake controller does not work with the brake pedal it is related to the red brake controller wire. The red wire receives input from the brake…

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Answer 4

The ground wire on a trailer's wiring harness (usually a white wire) should be firmly attached to clean bare metal on the trailer frame. The white ground wire on the vehicle's wiring harness should similarly be attached to clean bare metal on…

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Answer 5

I have included a link to a video on adjusting self-adjusting brakes. Basically there is a device on the adjustment wheel on these brakes that prevents the shoes from adjusting back inward. You have to sort of move that out of the way to be able to…

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Answer 6

Adjusting self-adjusting brakes is going to be a lot more difficult than manual adjusting ones due to the starwheel and how the self adjusting cable is attached. The procedure listed in Connor's answer is what has been relayed to us by Lippert as…

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Answer 7

Yes, you can manually adjust self-adjusting brakes with a spoon like the drum brake spoon #W80630. If you let me know what is going on with your brakes I can try to help you troubleshoot why your brakes need to be adjusted.

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Answer 8

The Dexter Nev-R-Adjust electric trailer brakes can be manually adjusted. There are a couple teeth of the adjustment wheel that are exposed just under the lever that you referenced. I have attached a photo showing the teeth. You will likely need a…

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Answer 9

I spoke with my contacts at Curt and Tow Ready, who both make wiring harnesses for the 2010 Chevy Equinox. They stated you will NOT have to reprogram the BCM or anything else to install the Curt T-Connector, #56094, or T-One with Upgraded Circuit…

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Answer 10

Normally trailer coupler height is around 17 inches, from the ground to the bottom of the coupler, and most hitch manufacturers design their hitches to work with a ball mount that will end up very close to this measurement. I am including a link to…

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Answer 11

The reason your factory brake controller wiring harness has five wires is because one of them is for a backlight setting that is not needed on most brake controllers nowadays which includes the Tekonsha Prodigy P3 Trailer Brake Controller part…

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Answer 12

If you are looking at the back of the trailer connector on your 2002 Ford F-350 where the wires attach then the ground wire is in the 5 oclock position. On the trailer side the ground wire would be in the 7 oclock position. It might be difficult to…

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Does Battery Need to be Disconnected to Install Tow Ready Trailer Wiring on a 2015 Toyota RAV4

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