I'm trying to track down the cause of the ABS warning light being lit. I'm focussing on one wheel at the moment - the one I've recently adjusted the bearings on. Logically a disturbed cable...
1. The cables look fine. No sign of damage or disturbance. Fiddling made no difference, including disconnecting the cable where it connects to the strut -looks nice and clean inside the connector.
2. With a multimeter across the ABS sensor terminals for that wheel the resistance is 970ohms when not moving, and goes up and down a little when you rotate the wheel, but not much - perhaps 100ohms. This does not sound like a great deal to me - what have others measured?
3. I've disconnected the battery, and reconnected. The car is on a stand and has not moved. On restarting the car after reconnecting, the ABS warning light is immediately on - does that argue against a sensor problem?
I don't ever recall being ever to noticably get the ABS to do anything, despite some very hard braking and the occasional lock. So I don't think I'm any worse off.. it's just the first time I've had a warning light!
cheers,
Chris
87 220T
1. The cables look fine. No sign of damage or disturbance. Fiddling made no difference, including disconnecting the cable where it connects to the strut -looks nice and clean inside the connector.
2. With a multimeter across the ABS sensor terminals for that wheel the resistance is 970ohms when not moving, and goes up and down a little when you rotate the wheel, but not much - perhaps 100ohms. This does not sound like a great deal to me - what have others measured?
3. I've disconnected the battery, and reconnected. The car is on a stand and has not moved. On restarting the car after reconnecting, the ABS warning light is immediately on - does that argue against a sensor problem?
I don't ever recall being ever to noticably get the ABS to do anything, despite some very hard braking and the occasional lock. So I don't think I'm any worse off.. it's just the first time I've had a warning light!
cheers,
Chris
87 220T
