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Bruce68SB is on the mark here.
Quote from 1969 Chevy Service Manual:
"Note: The brake pressure differential warning switch
is a non-adjustable, non-serviceable valve. If defective
it must be replaced."
"CA-KA-PA10-20, CA-PA-30,GA10-20 and SA-40-50 models
are equipped with a brake pipe distribution and switch assembly
(Fig 9). The front and rear hydraulic brake lines are routed from
the main cylinder, through the switch assembly, to the front and
rear brakes. The switch is wired electrically to the brake alarm
indicator light on the instrument panel. In the event of fluid loss
in either the front or rear brake system, the indicator on the
instrument panel will illuminate red when brake pedal is
depressed"
Image is attached.
So now having quoted the manual on this feature...I ask this
question. I have a custom dash. There is NO brake warning
light. So what good is this brake warning switch in MY case?
Jim M.
Mt Juliet, TN
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