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Re: Brake Light Timing Circuitry

To: Jjcousins@ra.rockwell.com
Subject: Re: Brake Light Timing Circuitry
From: Bob <s1500@worldnet.att.net>
Date: Sat, 19 Jun 1999 19:03:12 -0700
On Fri, 18 Jun 1999 Jjcousins@ra.rockwell.com wrote:

> When I start the car, the brake and
> (I think) the Fasten Seat Belt lights both
> come  on for a few seconds.  What timing 
> circuitry is doing this?

The seatbelt warning light is controlled by the
time/buzzer module on the interior bulkhead.
The light & buzzer will operate (momentarily)
only if the seatbelt is not fastened when you
first crank the car.  
FWIW the timer/buzzer is easily disconnected.

Assuming the handbrake is OFF, the brake
warning light illuminates while the key is
in the "crank" position to provide a lamp
test.  There's no timer here.  Of course the
lamp should also light if the handbrake is
on, or if the PDWA sense hydraulic problems.

Hope this helps,
Bob (& '78 Spitfires)

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