[6pack] Brake and Oil Warning Lights

[Bob]

Hi Dave,
They are using the oil pressure switch to check the brake failure lamp.
Turning on the ignition switch completes the circuit with 12volts through
the oil pressure lamp and brake lamp to ground coming from the oil pressure
switch. When the engine starts and you have oil pressure the switch opens
and the lamps should go out. If the brake failure lamp stays on and the oil
pressure lamp goes out the circuit is still getting ground probably from the
(PDWA) brake failure switch. If that's the case popping that wire off should
turn off the light. Maybe.
Regards,
Bob
----- Original Message ----- 
From: "Dave" <forzion at maine.rr.com>
To: <6pack at autox.team.net>
Sent: Tuesday, May 05, 2009 1:09 PM
Subject: [6pack] Brake and Oil Warning Lights


> Hey List;
>
> Can someone take a look at the diagram in the lower right corner of page
102 of the Dan Master's TR6 "Electical Maintenance" book and help me out? I
hate to use the word 'logic' when discussing Lucas handiwork but, what is
the logic of having the brake failure switch activating both the oil warning
lamp and the brake failure lamp? Does my '74 Six, in fact, even have a Brake
Failure Switch (as shown on the wiring diagram also at the back of the
book)? If so, where is it located? My brake warning light on the dash seems
to always be on any time the key is on, though all systems seem to be
operating properly. So, I am in the process of checking the hookups I've
made and am having some trouble determining the cause of the problem, much
less understanding the wiring diagram and switch location (?) in the circuit
there... Needless to say, TRF has no listing for a "brake failure
switch"....
>
> Thanks for any help...
>
> Dave
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