I had a similar problem (brake lights not lighting), and tracked it down
to a break in the line somewhere between the switches and the back of
the van.  I just ran a new wire - life's too short :o)

On 5/21/2017 11:38, B Feddish wrote:
> Brake warning light still on.
>
> I brought my van to the mechanics and he said the 2 3 prong switches in the master cylinder are good. I got the van back because he had to put it aside for a few days. So I decided to monkey with it.  I�ve even made it worse, now the lights don�t go on at all.
>
> I re-checked the switches. They have 0 ohms on the 2 terminals when at rest and 0 ohms on the other (pair) of the terminals when depressed.  The wire and switch for the parking brake work fine.
>
> Now the brake light and seat belt light will not come on.
> The grey green has ground, the black has ground, the red/yellow has 2.5 V , brown and blue black have ground and the big red has no voltage or ground at all.
>
> Suspecting the big red for the no lights problem, which I need to fix first, but I�m still puzzled by the warning light staying on.
>
> Any help is appreciated. I�m not very optimistic but if I have to take the van back he�ll have it for weeks again.
>
> Thanks,
> Bryan
>