Re: Brake Warning Light

[Mike Arman <armanmik@n-jcenter.com>]

>
>Date: Mon, 30 Nov 1998 07:34:39 GMT
>From: quk@isham-research.demon.co.uk (Phil Payne)
>Subject: Re: Brake Warning Light
>
>In message <366185c60d8f058@mhub3.tc.umn.edu> Bruce G Plante writes:
>
>> 1)Brake Warning Light (the red triangle! from the auto check system) comes
>> on temporailly during some brake applications at low RPMs and then goes
off.
>> Dealer said it was common for older pumps "temporary reduction in
pressure".
>> The warning sound is bother some however and I would like to disconnect if
>> possible.
>

Interesting phenomenon here - I *JUST* (60 days ago?) installed a brand new
bomb, and as of three weeks ago, have the exact same symptoms as above. Yes
the old bomb was shot, yes the brakes are far, far better, and yes, driving
with a bad bomb is utterly nuts.

HOWEVER - As of about three weeks ago (coincidence? Conspiracy???), one or
two of the "X" caps on the PS pump started leaking pretty badly ( a cup of
green gold per week or so ) and I am wondering if while they push pentosin
out on the up-stroke, are they sucking air in on the down-stroke? If they
were, that would aerate the pentosin and give lower pressure at the bomb
(and trip the low pressure warning light). Reason for advancing this theory
is that driving at low speeds gives "temporary reduction in pressure" per
the dealer's explanation, and if I drive the car in a more spirited manner,
the light goes out and stays out until I drive around slowly again for a
while.

I'm going to redo the "X" caps and O-rings under them in the next week or
two, and will advise results - needless to say, I am *VERY* reluctant to
assume the new bomb is bad. Given the situation, this theory seems to make
sense, but will be proved/disproved after the "X" cap r&r.

Best Regards,

Mike Arman