Handbrake dash light S3

Handbrake dash light S3

Author
Discussion

NeilS3

Original Poster:

331 posts

236 months

Thursday 17th April 2014
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Even though she passed the MOT today ( pleased as punch) my handbrake instrument warning light stays on/off while driving.....getting very annoying! Obviously a sensor shorting but has anyone had this and sorted it?

Regards

Neil

phillpot

17,105 posts

182 months

Friday 18th April 2014
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It's operated by a simple switch underneath the vinyl cover,held in place by a typically TVR "Heath Robinson" bracket probably just needs a little adjustment ....smash

mep12345

2,061 posts

200 months

Friday 18th April 2014
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Could also be at the master cylinder reservoir end as the level sensor here also activates that light. Firstly check the level isn't on the hairy edge of being too low as this would flash the light on and off when driving then check the cabling as it has a tendency to corrode where the cables connect to the cap

This bit in the pic



Ignore the dirt it ain't there now

Edited to correct spooling orrers

NeilS3

Original Poster:

331 posts

236 months

Friday 18th April 2014
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Cheers guys, will have a look this afternoon. After a drive of course as such a nice day.

Neil

greymrj

3,316 posts

203 months

Friday 18th April 2014
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I agree with the above, just disconnect the brake fluid cable first, and if that doesnt cure it you can presume the handbrake switch. As Phillpot says it is pretty easy to get to, and not TVR's finest hour! If you get the handbrake switch working right it might then be worth checking the fluid level switch works by just taking it out of the cylinder and seeing if a light comes on! Even better if the right light comes on!!
(It didnt at first on mine)

On the S1 there is a slight complication in that there are two warning lights, both red (on mine) which may or may not be connected the right way round. Furthermore they are cross connected in a way that means they probably both come on together whichever circuit is at fault! This is to be corrected in the next phase of work!

mep12345

2,061 posts

200 months

Friday 18th April 2014
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Forgot to add above you can check the level sensor wiring by pressing in the middle of the yellow bit in the reservoir cap with the handbrake off. The light on the dash should illuminate when the cap is depressed. This checks the wiring but not the float as it simulates a low level by shorting out the float.

Hedgehopper

1,537 posts

243 months

Friday 18th April 2014
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mep12345 said:
Forgot to add above you can check the level sensor wiring by pressing in the middle of the yellow bit in the reservoir cap with the handbrake off. The light on the dash should illuminate when the cap is depressed. This checks the wiring but not the float as it simulates a low level by shorting out the float.
Never knew that....amazing what you learn on Pistonheads!

NeilS3

Original Poster:

331 posts

236 months

Friday 18th April 2014
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Wow thanks folks, never of thought.