Land Rover Repair: 1995 Disco I - brake hum/buzzing, false signals, hi doug


Question
Thanks for the Reply John! ..
Here's one for you! ..
I changed my front shocks on the Disco I, and drove it the next day to work.  Not one time did the brakes start humming or buzzing.  Changing the shocks prior to my 600 mile trip, the brakes didn't hum or buzz until I arrived to my destination.  Once back on the highway again, they did not act up one time after that.  
As far as brake work, I have not had one since I purchased the vehicle last year.  The vehicle stops fine without noise and felt it didn't need brake servicing.

Your thought about the sensor was my next concern. If that may be sending a false signal to the modulator.

I will take you're advise about taking it to LR for a diagnostic.  Will provide additional information for others when service is complete.
Thanks!
Doug
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Followup To

Question -
Hi John,
Lately my brakes will hum or buzz at times when I apply the brake, then stop. There isn't any indication lights that warn me of an ABS problem when this happens. However, sometimes while on the road, even on a hot day it will buzz/hum, again would eventually clear without any light indication.
Would this be the ABS Modulator or a sensor failing?
Really afraid of my wife driving this because it acts as if the brakes do not work, unless you push harder than normal on the pedal.
Thanks!
Doug

Answer -
Hi Doug,

without a doubt, if you have the sensation that you do not have brakes, immediately take your Disco in for service.

It has to be the ABS modulator that is interfering with normal braking.  The cause is the mystery here.  It's possible that a sensor is sending false signals.  LR diagnostics should reveal the problems.

I get the hum/buzz sometimes on my '95 Disco.  Rare but it's happened.  This usually happens when I am due for new brake pads.  At least this is what I've noticed on my Disco. I'm not sure if that is the case on yours.

When is the last time you had brake work done?  Are you due for new pads or rotors?

Best of luck,

JohnMc

Answer
Hi Doug,

it's sure is a new one.  It does make sense though.  Bad or worn shocks have a dramatic affect on the stopping ability of any vehicle.  It's quite possible that the shocks were triggering the wheel sensor for excess work in the braking system.

Let's hope the dealer finds no ABS ECU faults and give you a clean bill of health (along with a small charge).

Please send me a followup afterwards.  I appreciate the info and will pass this along to others.

Regards,

JohnMc