Rear Lights

[GV]

Developed a problem with my rear lights. When switched on the brake lights also come on. When the lights are off the brake lights work normally.

I'm not sure if the bulbs are correct although I have used the correct type as per the connection.

Any ideas? The headlights, indicators, reverse and rear fogs all work normally....

[Waynester]

Check the terminals are not corroded and shorting out between the 2.

Give the contacts a clean.

[djc1001]

Terminals and / or most likely earth. Try cleaning terminals, holders and run temp earths direct to prove fault if nec.

david

[wedgeinald]

99% certain it will be an earth.....usually is with this type of fault.

I have a joke with my wedge....

If its an electrical fault..."Its the black wire" (all the wires on early wedges are black!! even the 12v etc)

[TVRleigh_BBWR]

wedgeinald said:

99% certain it will be an earth.....usually is with this type of fault.

I have a joke with my wedge....

If its an electrical fault..."Its the black wire" (all the wires on early wedges are black!! even the 12v etc)

Yes, I've just ripped the last of the all black wires out of the racecar and replaced with colour coded.

[adam quantrill]

When I had this one of the brake bulbs was internally shorted from brake to side filaments.

Sort it quickly or you could overload the sidelight wiring - it supplies all the brake and side current with this fault present.

[D1 MAD]

GV said:

Developed a problem with my rear lights. When switched on the brake lights also come on. When the lights are off the brake lights work normally.

I'm not sure if the bulbs are correct although I have used the correct type as per the connection.

Any ideas? The headlights, indicators, reverse and rear fogs all work normally....

Have you just changed the bulbs? I'm just wondering if they are 180 degrees out in the holders so that the brighter filament is powering up on the position lights so you can't see the weaker filament coming on (with the brake) until you turn the position lights off. Not always easy to spot the difference in daylight.
Just a thought.

[GV]

Well I checked the earth connections with the results that lights got even brighter!!

Regarding the bulbs - can someone let me know which type of bulb should be used. I have connected what I believe to be the right type of bulb for the relevant connection just in case I may be using the wrong types - a pic or a diagram would put my mind at rest...

Thanks

Andy

[jmorgan]

I had some real oddies happening with mine but turned out to be the circuit board the lamps were plugged into. They may need a good clean but certainly check the bulb first. Manual says below but bulb seems odd? 400 but any different to the 350?

[GV]

Problem sorted guys - in the end it was a combination of the wrong bulbs and dodgy connections. The earth was ok...

Now for the MOT!