My rule of thumb for auto wiring is: when lights do funny things look for
grounding problems. Grounding problems can make the strangest things happen.
Sam
At 08:47 AM 6/21/99 -0400, Jjcousins@ra.rockwell.com wrote:
>
>More info on why I'm asking. It's probably a CDO thing but...
>
>since a few days ago, my brake light will turn on for a fixed amount of time
>if...(and I think this is true) there's a
>change in current flow EVEN WITH THE CAR OFF!!! For example the following
>things cause the brake light to come on
>for about 5 seconds and then turn off (with the car off):
>
>* hitting the horn (sometimes)
>* turning ON the lights
>* turning OFF the lights
>* opening a door with a couple of accessory lights on (sometimes)
>
>What the heck???? I looked under the driver's seat for any loose wires near
>the handbrake wire connector thing and couldn't find the handbrake wire. I
>disconnected mine a couple of years ago since the connector had failed. I did
>find a loose wire under there but grounding this one
>caused the Fasten Seat Belt light to turn on, so I knew it wasn't this one.
>
>Could it be the seat belt buzzer thing under the dash? I have
disconnected the
>grounding connector under the steering column because
>the buzzer was enemic and horrible sounding.
>
>Oh, also when driving, the Brake light will flicker sometimes and do the 5
>seconds pulsing at other random times during a drive...
>
>Goblins?
>
>Please help.
>
>Thanks in advance - John Cousins 1977 Spitfire
>
>
>
>
>
>Bob <s1500@worldnet.att.net> on 06/19/99 10:03:12 PM
>
>To: John J Cousins/Cleveland/RA/Rockwell
>cc: spitfires@autox.team.net
>Subject: Re: Brake Light Timing Circuitry
>
>
>
>
>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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