steveskeggy
Active Member
- Joined
- Jul 4, 2011
- Messages
- 188
- Car
- S55 AMG
Here we go again with the dreaded speed sensors.
Quick(ish) history.
Car is 2003 S55 AMG.
Car off road for two years.
Car back on road.
Car passed MOT because on start up and in the workshop, the ABS light was not illuminated.
Offside sensor working, nearside not working.
Took to dealer, dealer got nearside one working, but offside not working anymore.
Changed sensor for Ebay special.
All fixed! No warnings, steering perfect, drove it up and down the road, yippee!
Then...
Got to around 30mph and ABS light kicks in, steering goes heavy, warnings on dash about ABS, BAS,CSI,CIA,SAS, you know the usual ones.
Went to dealer, dealer said its because its not a Mercedes sensor.
Paid £100 for Mercedes sensor.
Car worse, warnings come on straight away, steering heavy after about 5mph.
Weather now too cold to work on car, so driving around with heavy steering and no ABS, not good when conditions get slippy.
OK, so having put so many sensors on the car on the offside, and trying a different ABS BAS etc control unit, I have come to the conclusion that there is an open circuit in the wiring between the sensor and the control unit.
In particular, I am suspecting the socket that fits into the inner wing, which doesnt look all that healthy.
I have removed the socket from the wing for now because of the problem, and because pushing the plug from the sensor into the socket with the socket in place is difficult to say the least.
So, what I want to know is..
If I cut the socket out, and solder the end of the sensor wire to the two wires that come from the loom, will it cause problems because of changes in resistance?
(I am quite good at soldering).
The signal going to the sensor, is I believe 12v, others vehicles have stated 5v, but whatever it is, the signal coming out of the socket wont be huge, and before I try, I would like to know if it may or may not cause problems.
Thanks
Quick(ish) history.
Car is 2003 S55 AMG.
Car off road for two years.
Car back on road.
Car passed MOT because on start up and in the workshop, the ABS light was not illuminated.
Offside sensor working, nearside not working.
Took to dealer, dealer got nearside one working, but offside not working anymore.
Changed sensor for Ebay special.
All fixed! No warnings, steering perfect, drove it up and down the road, yippee!
Then...
Got to around 30mph and ABS light kicks in, steering goes heavy, warnings on dash about ABS, BAS,CSI,CIA,SAS, you know the usual ones.
Went to dealer, dealer said its because its not a Mercedes sensor.
Paid £100 for Mercedes sensor.
Car worse, warnings come on straight away, steering heavy after about 5mph.
Weather now too cold to work on car, so driving around with heavy steering and no ABS, not good when conditions get slippy.
OK, so having put so many sensors on the car on the offside, and trying a different ABS BAS etc control unit, I have come to the conclusion that there is an open circuit in the wiring between the sensor and the control unit.
In particular, I am suspecting the socket that fits into the inner wing, which doesnt look all that healthy.
I have removed the socket from the wing for now because of the problem, and because pushing the plug from the sensor into the socket with the socket in place is difficult to say the least.
So, what I want to know is..
If I cut the socket out, and solder the end of the sensor wire to the two wires that come from the loom, will it cause problems because of changes in resistance?
(I am quite good at soldering).
The signal going to the sensor, is I believe 12v, others vehicles have stated 5v, but whatever it is, the signal coming out of the socket wont be huge, and before I try, I would like to know if it may or may not cause problems.
Thanks
