Help no brake lights

john denmead · Post by **john denmead** » Wed Nov 26, 2003 7:14 pm

Can anyone give me an idea what to look for have checked number 5 fuse which I think contols brake lights and auxillary cooling pump.Noticed I used to get a clicking sound when applying brakes cant hear that now.Is there some relay or switch that may be faulty.Hope someone can help.
Cheers John.

MatBat · Post by **MatBat** » Wed Nov 26, 2003 7:21 pm

Check the switch on the brake pedal. Also check the bulbs (if you haven't already)

Hope you can get it sorted.

dan · Post by **dan** » Wed Nov 26, 2003 10:38 pm

Yeah sounds like it could be the brake switch. About Â£8.
Hope its that as its cheap althought its hard to locate...well l couldnt find it lol

pol · Post by **pol** » Wed Nov 26, 2003 10:46 pm

Yeah, if i remember rightly, you've got to do a sort of headstand into the footwell, put 1 leg on the sunroof, and another out the passenger window. Put 1 finger in the cigarette lighter socket and bend your back. Using your free hand, you might just be able to unscrew the awkward bastard switch thing!

Have fun!

pol

MatBat · Post by **MatBat** » Wed Nov 26, 2003 10:48 pm

when foot out of passenger window be careful not to touch the electic window switch!

Also, do not attempt this while driving, or engine running

pol · Post by **pol** » Wed Nov 26, 2003 10:50 pm

I did mine this way on the M25. It was fine. Seriously.

pol

MatBat · Post by **MatBat** » Wed Nov 26, 2003 10:57 pm

IT WAS YOU!!!!!

john denmead · Post by **john denmead** » Thu Nov 27, 2003 6:18 am

Thanks for the suggestions will try and get to brake switch today another problem occured now since I was trying to fix lights last night now both indicaters come on when I turn indicater on

will look in daylight today hope its not raining.

MatBat · Post by **MatBat** » Thu Nov 27, 2003 8:22 am

I have never heard of that before.

Sounds like it could be an ECU/CEM (I can never tell the difference) fault.

gerrsvolvo · Post by **gerrsvolvo** » Thu Nov 27, 2003 9:50 am

Hi John Denmead
Do not be afraid.
The indication to left or right direction does (I am pretty sure) not work via the CEM. The blinking itself goes via the CEM.
So if the indicators are blinking, the CEM is OkÃ©.
Maybe some connectors have been wrong or not good been been put together in the dark.
Good Luck
Gerrsvolvo

MatBat · Post by **MatBat** » Thu Nov 27, 2003 1:09 pm

What is the difference between a CEM and an ECU?

chris1roll · Post by **chris1roll** » Thu Nov 27, 2003 7:35 pm

ECU = engine

CEM = central electric module = all the electrical gubbins that aren't connected to engine operation

MatBat · Post by **MatBat** » Thu Nov 27, 2003 7:38 pm

I see.
So the CEM is the naughty one in our cars.

chris1roll · Post by **chris1roll** » Thu Nov 27, 2003 8:10 pm

yes, although it seems to be grounding (earthing) points and corroded connectors that cause a lot of the problems.

volvofox · Post by **volvofox** » Thu Nov 27, 2003 11:09 pm

mwoa, I dare to relativate this. the first time i went to a scrapper for 480 parts I was lucky to find the exact same CEM, so I bought it rightaway, because everyone was saying this was the worst aspect of the car, causing the most trouble. I have it laying in my workshop closet for 7 years.

Of course I try to swap it when I have trouble, but every time it is something else, something stupid like bad grounding, dirty connectors or switches....

Aldough it is thue it regulates the funniest things in the car, if not all, I am not that prejudged.

luck JPF

btw ECU means simply Engine Control Unit. You will never forget again.

MatBat · Post by **MatBat** » Thu Nov 27, 2003 11:25 pm

Sorry

Volvo 480 Club Europe

Help no brake lights

Help no brake lights

help no brake lights