XJ6 & XJ12 Series I, II & III 1968-1992

Brake switch

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Old Mar 20, 2021 | 06:29 PM
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Default Brake switch

Hi everyone

Could someone please tell me what this switch does? Its attached to the brake pedal but isn't the brake light switch.

Thanks for your help

Tom


 
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Old Mar 20, 2021 | 07:01 PM
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I figured it out! Does it matter if this switch is connected/working if you do/dont use cruise control?

Oh, youve probably guessed im a new owner!! one more question -

Both my indicators work, however, when I put the hazzards/warning lights on only the left side flashes - any idea how to fix this?!

Thanks again

 
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Old Mar 20, 2021 | 07:32 PM
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Yup, cruise control release switch. If you don't use the cruise control you don't need the switch.....but make sure other drivers know this.

For the hazard lights try exercising the switch numerous times. If the internal contacts are oxidized....they probably are....this exercise will sometimes clean them. Don't get rough with it, though. The switch isn't very robust.

And/or see if you can mange to get some aerosol electric contact cleaner into the innards of the switch

If no luck, post back

Cheers
DD

 

Last edited by Doug; Mar 20, 2021 at 11:30 PM. Reason: sp
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Old Mar 21, 2021 | 03:34 PM
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Thanks so much for your help Doug, really apreciate it - I will try that tip!
 
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Old Mar 22, 2021 | 01:17 PM
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That cruise control switch is an interesting application. It works opposite the brake light switch. Default is engaged and CC works. Tap the brake pedal and the CC circuit is open. NO CC, no throttle application. A safety feature...

CC is not enabled in my lump. Not a favorite to me. but, that switch is used. Torque converter lock... Opens the TC circuit when the pedal is depressed...

Carl
 
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Old Mar 22, 2021 | 01:43 PM
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Thanks Carl - I'm a little unsure as to what you mean - are you saying the same switch is connected to the torque converter?
 
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Old Mar 22, 2021 | 02:15 PM
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No, Carl has a GM drivetrain, so he is using that switch to control torque converter instead of cruise. I have same setup as Carl, it is like a backwards brake light switch, when pedal not pushed 12 bolts flows through, interrupted by application of brakes.
 
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