Triumph Repair: Centralise a PDWA, brake warning light, triumph spitfire 1500

Question
QUESTION: My front driver side caliper seized while driving was not sure of the cause but have replaced both front flexi brake pipes and the caliper. Have bled the brakes. Then tried to centre the PDWA. However can here no click, also the oil warning light does not go off. If I just push down on the brakes and release slowly I can here the click. The brake warning light does come when carrying out the procedure but the oil light does not dim and no click is herd. Could it be i just have air still in the system?

ANSWER: Hi Alistair,
First I need to know what kind of car this is.
Howard

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QUESTION: Triumph Spitfire 1500-1980

Thank you

Answer
Hi Alistair,
If you have the brake system working and all of the air out of the system and just want to turn the light out for the brake warning, just pump the pedal up and hold it down and and watch the light or put an ohm meter on the switch and just slowly open each side one at a time and bleed a little fluid out at the lines exiting the PDWA switch junction. When you do it slowly on the side that the piston is over to the light will stay on but when you bleed the side that the piston is away from it will put the light out. Some of these PDWA junctions have the switch in such a position that you can remove the switch and look in the hole and see the notch in the piston over to one side and I have been able to just use a pick to pry the piston over to center. That way I didn't have to try to figure out which side the piston was over to.

I have no clue what you are referring to about a "Click". I know of no "Click" noise in reference to brakes.

As for the oil light, that has nothing to do with the brake warning light. If you have a oil light on when running you need to do something right away because the oil pressure light on means no oil pressure and an engine will receive major damage in just seconds of running with no oil pressure. You need to first put a hydraulic gauge in place of the sending unit and read oil pressure. You should see from 25 to 35 PSI at idle and from 45 to 65 PSI at 2000 RPM with warm oil. If you don't see that on a hydraulic gauge, you have a large problem that must be corrected right away.
If the oil pressure is ok and the light is on you just need a wiring diagram and trace the circuit to see what is wrong with the circuit. If you don't have a diagram let me know and I will put one up on my web site for you to copy.
Howard