Brake light and abs light on

Kenter

Member
Joined
Aug 31, 2019
Location
Utah, USA
TDI
1 MKIV Jetta
As the title says they are always on. I've disconnected the battery tonight to see what if anything that will do. The brakes are brand new. As in new rotors and pads all the way around. Does my radio not working have anything to do with it? Any info is much appreciated.
 

Nero Morg

Veteran Member
Joined
Oct 19, 2017
Location
OR
TDI
2003 Jetta wagon, 2001 Jetta TDI, 2014 Passat TDI
It'll help if you scan for codes. Something else to check is your brake fluid resivoir, see if the connector is connected, and the resivoir is at least to the min mark.
 

Kenter

Member
Joined
Aug 31, 2019
Location
Utah, USA
TDI
1 MKIV Jetta
Brake res is good topped off and connected. No codes in conjunction with aforementioned warning lights. Now that I'm logged into Tapatalk I can upload these pics I took. Noticed while doing the brakes these butt connectors. Not installed by me I might add.


Sent from my ONEPLUS A6013 using Tapatalk
 

Nero Morg

Veteran Member
Joined
Oct 19, 2017
Location
OR
TDI
2003 Jetta wagon, 2001 Jetta TDI, 2014 Passat TDI
That particular wire is for the brake wear sensor. It'll be a light that's a circle with three lines on each side of it. The brake/abs light is something else. Are you able to check the ABS module for any codes?
 

Tdijarhead

Top Post Dawg
Joined
Nov 10, 2013
Location
Lawrenceville PA
TDI
2003 TDI Jetta Daughters Car, 2001 TDI Beetle, Daughters car, 2005 Golf TDI Mine, all 5 spds
Your abs light and brake light are related to each other. Since you don’t have a code reader to point you in the right direction, your best bet at this point is to take those connectors apart and completely redo them. Obviously someone had issues here before. If that doesn’t solve the brake/abs light you’re going to have to get it scanned with vcds unless there is another obvious problem somewhere.

Two of those wires go to the brake wear sensor and two to the wheel speed sensor. You can tape the two wires to the brake pad sensor together to eliminate the wear indicator light on you dash. The wheel speed sensor wires need to be fixed properly.
 
Last edited:

oilhammer

Certified Volkswagen Nut & Vendor
Joined
Dec 11, 2001
Location
outside St Louis (where it's safe)
TDI
There are just too many to list....
You can turn the brake warning off in the Instrument coding, no need for any rewiring of anything.

If the ABS light is on, there is either a DTC stored in the ABS module, or the ABS module is not communicating. Which is it?
 
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