ABS ESP BAS finally found
Thread Starter
Newbie
Joined: Mar 2006
Posts: 13
Likes: 3
From: Quebec, Canada
E63 2010
ABS ESP BAS finally found
After a long search with the help of many post combined, I found the solution. This may help others with this. First, the problem: ABS, ESP, BAS and bulb error occur when brake is applied. With the post read here, I change the brake switch. Still not working. Check the swich with multimeter, re-calibrate, no more result. Try another new switch, still the same problem (All the light goes off each time I restart). Try to find the wiring schematic 
now way to find a global view. Read post again and check for relay K25 and K12, can't find where they are so I swap all the relay one at a time. Still not working. Read forum again and find a post on the fuse #2 driver side dash left side. Fuse good but change anyway. Still unhappy. Find a thread that spot cold welding in the fuse box liked to the head beam light swicht. Remove it, open the box and weld every pin accessible. Still unhappy. Go to see my mechanic for a diagnostic (few days later). Read code and suspect brake swich... 
. Remaining cause ABS module, SAM module or transmission module. Swap all those with my father E430. Still unhappy. Finally follow the circuit from the brake swich to the fuse box Beam light. Find 12V on the switch but when the bulb are in the circuit, impossible to draw current. The second thread was wright but I didn't repaire with the soldering. Fuse module 1500$! cheap solution: Put a jumper in the fuse #2 and start a new wire fused in line to the brake switch, eh voilà
.
now way to find a global view. Read post again and check for relay K25 and K12, can't find where they are so I swap all the relay one at a time. Still not working. Read forum again and find a post on the fuse #2 driver side dash left side. Fuse good but change anyway. Still unhappy. Find a thread that spot cold welding in the fuse box liked to the head beam light swicht. Remove it, open the box and weld every pin accessible. Still unhappy. Go to see my mechanic for a diagnostic (few days later). Read code and suspect brake swich... . Remaining cause ABS module, SAM module or transmission module. Swap all those with my father E430. Still unhappy. Finally follow the circuit from the brake swich to the fuse box Beam light. Find 12V on the switch but when the bulb are in the circuit, impossible to draw current. The second thread was wright but I didn't repaire with the soldering. Fuse module 1500$! cheap solution: Put a jumper in the fuse #2 and start a new wire fused in line to the brake switch, eh voilà.
Junior Member
Joined: Dec 2009
Posts: 67
Likes: 0
E 63 amg
bas esp light
HI my name is Carlos i own 2000 e430 sport about 7 months ago the BAs/esp light came on a i switch the brake light switch under the driver and the light went away for 6 months and today the light came on again what could it be??
thanks in advance
thanks in advance
