Brake warning light and switches
- Thread starter 67westy
- Start date
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Looking around it looks like the ATE cylinders for the 70 only have one port for the switch. As long as it's working stick with it I guess..just check the lights every so often 
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Yes that’s right. But what’s the advantage of two switches?
Does only one switch mean that the warning light comes on only if one circuit goes but not the other one ?
That can’t be right.
Also I presume I need a wire to the front on the third connection to make it work. I just had a re wire done so I’m surprised it’s not connected up.
Does only one switch mean that the warning light comes on only if one circuit goes but not the other one ?
That can’t be right.
Also I presume I need a wire to the front on the third connection to make it work. I just had a re wire done so I’m surprised it’s not connected up.
mike202 said:
So with one switch the warning light won't work either with a 2 or 3 pin switch as the warning circuit relies on one switch working to put power to the warning light.
The advantage of 2 switches is that of one of them fails the other will still operate the brake lights, with a single switch that fails and your brake lights won't work.
These diagrams I found show how the 3 pin setup works, I guess if you had one 3 pin switch it would light the warning light every time you brake? I guess it would show the switch is still working!
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Thanks for that. I’ll look into replacing the MBC for a two switch one.
How do you tell which terminal is which, are they stamped?
