97 NAS 90 "Brake " warning light. - Defender Source
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  #1  
Old May 4th, 2010, 01:07 PM
Roverlab
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Trevor Griffiths
85 110, 92 110, 92 RR, 06 LR3
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97 NAS 90 "Brake " warning light.

Has me a little stumped: Turn the ignition on or start the car, after about 8 seconds, the red Brake warning light illuminates, but not 100% brightness. Apply the driveshaft brake or jump the low fluid float and the light intensity increases to what I'd call normal. Disengage the driveshaft brake or remove the float jumper, and the light extinguishes for about 8 seconds, and will return again at it's diminished intensity.
I suspect the bulb check unit maybe back feeding internally, but I don't know where it is.
Yet.
Help?!

Also, it has an aftermarket alarm with about 42 wires going into the control unit. The current owner doesn't uses the alarm- no remotes- and the doors lock and unlock electrically with the ignition, but when I disconnect all of the harness connectors into the ecu, it does not affect the Brake warning light. (The doors will no longer lock or unlock and the actuators must be very strong as I can't move the lock buttons).

Thoughts?

Trevor
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  #2  
Old May 4th, 2010, 03:27 PM
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fenwaystan
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Christopher Giles
1997 D-90
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Okay, I am going to mess up the terms, but here goes. I had the exact same problem and the "screen" type contraption in the break fluid reservoir simply needed to be cleaned (sprayed out with WD-40) and put back in. It solved the problem in minutes. Make sense?
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Old May 5th, 2010, 06:50 AM
Roverlab
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Trevor Griffiths
85 110, 92 110, 92 RR, 06 LR3
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Seems logical, but even if I disconnect the wires to the float and jumper them, eliminating the float from the equation, I still have the same condition.
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