rear brake lights

General Technical Questions and Answers last answered over 1 year ago.
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Mocki
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Post by Mocki »

first place i'd look would be the pressure switch in the master cylinder, twin spade connection, join them together and see if the brake lights light, the switch costs about £3 from gsf and takes 2 mins to change.......
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tonytech
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Post by tonytech »

Presumably the bulbs are OK.

Have a look at the earths too.

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Cate
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Post by Cate »

theres something funny going on

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purplechugster
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Post by purplechugster »

The hole where the bulbs go in can be a right pain - with mine the bulb needs to be wiggled about until its in position x rotation y and pressed in z. They dont hold a uniform current across the whole thing - so first of all try giving them a wiggle while someones hold the brake down (whilst carefully not electrocuting yourself) :?
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tonytech
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Post by tonytech »

If you have a poor earth or corroded connector a voltmeter will show 12V. as soon as you try to dtaw a current (ie a brake light bulb will draw about 0.5 A) the voltage will fall to zero.

I find a 5W bulb soldered to test leads usefull.

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