Brake lights are not working properly

2007 LAND ROVER LR3
127,000 MILES • 4.4L • V8 • 4WD • AUTOMATIC
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DUGGG
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Brake lights were working, replaced switch, now they work fine unless headlights are on, they stay on, tried another switch, no change. I tried a headlight switch, no change. Help! Thanks
Code says it is brake light switch.
Oct 8, 2018 at 12:03 AM
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STRAILER
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Hello,

Please check fuse #15 - 15 amp in the fuse panel on the right side of the dash. Here are the brake light wiring diagrams to help you see how the system works. If the fuse is okay I would check the outputs of the GEM.

Here is a guide to help you check the fuse for power and the fuse location as well:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

and

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.

Cheers, Ken
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Oct 9, 2018 at 11:43 AM
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DUGGG
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Fuse number 15 is 30 amp, I am including pictures. Thanks
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Oct 9, 2018 at 3:54 PM
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STRAILER
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Sorry, the fuse panel inside the car #15, see if it has power with the key on.
Oct 10, 2018 at 2:31 PM
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DUGGG
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Hi, could you please tell me the location of the interior fuse box? I have looked all over YouTube to find out but no luck, thanks.
Oct 12, 2018 at 7:15 PM
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STRAILER
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It looks like it is under the dash on the passenger's side here is a diagram below. Please let us know what happens.
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Oct 13, 2018 at 11:02 AM
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DUGGG
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Hi sorry to bother, could not find fuse box under dash. Do I have to remove glove box or something? Also, would blown fuse cause this issue? Thanks
Oct 15, 2018 at 12:53 PM
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STRAILER
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Yes a blown fuse can cause this. You might need to remove the glove box because the blower motor is near the fuse panel. If the fuse is good we need to check the switch next. Please let me know.
Oct 16, 2018 at 10:15 AM
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DUGGG
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Okay, found fuse box behind glove box, #15 is good, ideas? Thank you!
Oct 20, 2018 at 11:30 AM
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DUGGG
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Oh and yes it is hot with key on.
Oct 20, 2018 at 11:34 AM
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STRAILER
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Okay now we need to check for power at the stop light switch green/orange wire.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the diagrams (below). Please let us know what you find.
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Oct 22, 2018 at 9:56 AM
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DUGGG
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Okay, I spoke with another mechanic, he said replace bulbs with Landrover OEM, I did ( $7.00 each ), Now the brake lights work wen headlights are on, but only the left side and overgate, the right one goes off wen brakes applied, but at least there are some brake lights. Any ideas? Thanks
Oct 23, 2018 at 9:47 PM
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STRAILER
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It sound like you dont have the bulbs in right can you recheck them and clean the contacts this guide can help.

https://www.2carpros.com/articles/brake-lights-not-working

Please let us know what you find.
Oct 24, 2018 at 10:55 AM