Brake Light?

[Kneale Brownson]

Could be the brake accumulator check valve failing, allowing Pentosin 
pressure to drop  slowly while the engine is shut off for normal longer 
periods.  Does it occur at most start-ups, even if the engine's only off 
briefly, or just after extended shutoffs.  I'm not sure what the long-term 
pressure retention is supposed to be.  One thing you might check is do the 
"bomb" test before you start the engine.



At 10:06 PM 03/23/2001 -0600, Robert Deis wrote:


>1986 5ktqw, the multi-complaint system is giving me a "brake" warning
>intermittently.  Pentosin and brake fluid levels are both good, and I've
>detected no problems with brake operation.
>
>Pumping the brake pedal after shutting the car off, I find it very
>difficult to detect that the power assist has gone away, so I'm not sure
>how many pumps it takes..  Operation when I'm driving is fine.
>
>Most often, the brake warning comes on shortly after startup and goes away
>after a few seconds, but it seems to randomly appear at other times as
>well.
>
>What's the deal, masters?
>
>--
>------------------------------------------------------------------------------
>   Rob Deis                  "Let the people know beforehand what the law
>   MiB3347                      is and what they are to expect."
>   rdeis at io.com                              -- 18th Congress, Rec. 75
>
>