Rear brake lights not working

[goldie87]

Hi all,

My rear brake lights on either side have stopped working, but the long brake light on the boot lid is still working..

Could it be a fuse?

Bit odd for both to go at the same time, normally its one or the other, indicating it may be a bulb?

I havent got a manual with the car so can someone please confirm which fuse(s) relates to the rear brake lights?

 

[GS16LRHP]

Should be fuse 13 and it's 10A for the rear brakes. Fuse list below:

Layout of fuses
No. Component A1)
1– Heated washer jets,
heated mirrors......................... 10
2– Indicators ............................... 10
3– Lights ..................................... 5
4– Number plate lighting ............. 5
5– Comfort on and off .................. 7.5
6– Central locking ........................ 5
7– Reverse lights ......................... 10
8– Telephone............................... 5
9– ABS ........................................ 5
10– Petrol engine control unit ........ 10
11– Instrument panel..................... 5
12– Supply current, diagnosis,
telephone ............................... 7.5
13– Brake lights ............................ 10
14– Interior lighting, central locking/
electric windows...................... 10
Interior light ............................ 5
15– Instrument panel,
automatic gear box.................. 5
16– Magnetic clutch, electric
water pump............................. 10
17– Free ........................................ 7.5
18– Main beam, right ..................... 10
19– Main beam, left ....................... 10
20– Dipped beam, right ................. 10
21– Dipped beam, left.................... 10
22– Side light, right ....................... 5


No. Component A1)
23– Side light, left ......................... 5
24– Windscreen washer system,
pump ...................................... 20
25– Heating, air conditioning ......... 25
26– Heated rear window................. 20
27– Rear window wiper .................. 10
28– Fuel pump ............................... 15
29– Engine control, petrol engine ... 10
30– Sliding roof ............................. 20
31– Automatic gear box.................. 20
32– Injectors: petrol....................... 10
Engine control, diesel.............. 15
33– Headlight washers................... 20
34– Engine control, diesel engine... 10
Engine control, petrol engine ... 10
35– Trailer device connection layout... 30
36– Fog lights, rear fog light .......... 5
37– Contact ................................... 10
38– Boot light, Central locking/
electric windows...................... 10
39– Hazard warning lights.............. 15
40– Horn........................................ 20
41– Lighter .................................... 15
42– Radio ...................................... 15
43– Engine control, petrol engine ... 10
Engine control, diesel engine .. 10
44– Heated seat ............................ 15

 

[goldie87]

thanks for the info pal, I checked the fuses, they were ok, I checked both bulbs, they were OK too.. but the lights are still not working.

any idea what to try next??

 

[GS16LRHP]

Sounds like a possible faulty brake light switch. It's quite easy to change the switch, here's a vid for a VW but should be very similar for SEAT:
https://www.youtube.com/watch?v=xCLh3Jccaao

 

[GS16LRHP]

Just to add, I'm not sure if the faulty switch would show up in a diagnostic tes, I'm also not sure if that if there is a fault code related to the brake switch and you replace the brake switch if that error code has to be cleared. I'll see if I can confirm, or maybe another member can confirm.

 

[goldie87]

Hi mate, if it was a faulty brake light switch, wouldn't the brake light on the boot not be working either??

 

[GS16LRHP]

Ahh doh, sorry! You did say that the LED light was working in your first post. You're right, if the high level LED lights are working it rules out a faulty brake switch. Your issue could be faulty wiring to the rear lights or a possible bad earth.
I don't have a wiring diagram but there should be a split connection for the LED light and the rear brake lights, I'm not sure where though.