sierra cosworth brake lights
my car seems to have no brake lights both bulbs are good and all fuses under the bonnet are ok. Also have checked the switch with a meter and this working fine as well.
Is there any relay for them if so which one is it? Also is there another fuse for them at all maybe in the passenger foot well?
Any advice would be great
Thanks
Is there any relay for them if so which one is it? Also is there another fuse for them at all maybe in the passenger foot well?
Any advice would be great
Thanks
Put the ignition on and check that one of the two pins at the switch plug is live, if it is then either the switch is duff, or there is a break between plug and rear lights, there is no relay for the brake lights.
Using a metre is ok but this will miss things ie it can easily read ok on a multi metre esp a digi one, but not have suffecient conductivity to pass current under load, brake lights are going to use roughly 3.5 amps, a multi metre passes a huge amount less.
If no live present with ignition on then check fuse 21 very carefully pull it out, due to age and the use of aluminum for the blades of the fuses these corrode, often just a clean up with a bit of emery will sort things, of course one of the terminals the fuse goes into will be live with ignition on.
tabetha
Using a metre is ok but this will miss things ie it can easily read ok on a multi metre esp a digi one, but not have suffecient conductivity to pass current under load, brake lights are going to use roughly 3.5 amps, a multi metre passes a huge amount less.
If no live present with ignition on then check fuse 21 very carefully pull it out, due to age and the use of aluminum for the blades of the fuses these corrode, often just a clean up with a bit of emery will sort things, of course one of the terminals the fuse goes into will be live with ignition on.
tabetha
Thread
Thread Starter
Forum
Replies
Last Post
charliecosworth
Ford Sierra/Sapphire/RS500 Cosworth
3
Aug 19, 2015 02:00 PM
155lee
Ford RS Cosworth Parts for Sale
0
Aug 14, 2015 11:21 AM




