Which Fuse in 2019 Toyota Highlander Is Used for PK5231201 Battery Isolation Solenoid

Question

Question:

Is there a ACC powered fuse in the 2019 Toyota Highlander LE V6 AWD engine fuse box that I can tap to trigger a battery isolation solenoid or relay so that trailer AUX power is only available when the vehicle is turned on? If not do you have other suggestions to accomplish the same thing? I dont want trailer AUX power to be hot at the trailer connector when the vehicle is off.

asked by: Charles G

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Expert Reply:

Any ignition powered circuit can be used to trigger the # PK5231201, but most folks use the radio fuse. The online copy of the owner's manual doesn't provide a listing showing which fuse does what, but the lid of the fuse box will have a diagram listing which fuses protect which circuits. Once you locate the fuse, go to your local auto parts store and get a fuse tap that's compatible with that type fuse. The center post of the battery isolator would connect to the fuse tap.

expert reply by: Mike L

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Answer 1

If you take a look at the accompanying photo you can see our installer point out the exact location where you need to install the fuse in your 2018 Toyota Highlander when installing the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer…

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Answer 2

The most likely issue is a blown or missing fuse for the trailer lighting. Locate the fuse panel under the hood, on the driver's side, near the fender. Your Owner's Manual can additionally provide you a picture of the location and…

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Answer 3

In regards to the Curt T-Connector Vehicle Wiring Harness part #C56217 which is a fit for a 2019 Toyota Highlander, you have two options to secure the trailer connector. The option that Curt recommends is to simply route the connector up through the…

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Answer 4

No you should not have constant power on the brake output pin, the blue wire should only have power with the brake pedal depressed in the vehicle or the brake controller manual override is activated. If the blue wire has a constant 12V then it is an…

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Answer 5

The 12 volt circuit is supposed to be always active on the 7-way after it's wired. If you are experiencing some other problem let us know and we will do our best to come up with a solution.

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Answer 6

If the trailer has a charger, the 12 volt circuit from the vehicle would need to connect to it. If the 12 volt circuit was attached directly to the battery, it would maintain the battery but not up charge it. You may also want to look at any wiring…

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Answer 7

I'm happy to help with that isolator and wiring. I checked your invoice and see you went with the Battery Isolation Solenoid #PK5231201. This is a good choice and will need to be mounted to the frame because it uses the mounting holes for ground.…

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Answer 8

Yes, you need to use a different circuit to trigger your battery isolation solenoid. Typically one of the circuits controlled by the ignition key is used - often the circuit for a power antenna is a good choice. You would use a fuse tap like #F2526…

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Answer 9

The 12V feed from your tow vehicle's 7-Way connector carries enough current to maintain a charge on your trailer mounted battery, but it does not have enough to actually charge up a depleted battery. Since the battery will really only get a…

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Answer 10

I can't say that we've heard of any issues with needing special wiring for your 2020 Toyota Highlander, especially if it already has the 4 way plug like the #TK74FR installed from the factory-all of the wiring has already been done. The only…

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Answer 11

There is a slight draw even when the vehicle is shut off, this is normal as the wire that feeds that circuit is connected directly to the battery. The LED draws a minuscule amount of voltage, so unless the vehicle will sit for several months on end,…

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Answer 12

The stop light switch circuit on a 2019 Toyota Highlander which will be needed to install a brake controller like the Tekonsha Prodigy P3 Trailer Brake Controller part #90195 can be found by testing the bundle of wires attached to the brake pedal.…

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Which Fuse in 2019 Toyota Highlander Is Used for PK5231201 Battery Isolation Solenoid

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