m_power 0 Report post Posted February 25, 2010 1991 E34 535i The bulb warning light in the instrument cluster will not go out. I have replaced the blown bulb yet it still stays on. If I have my foot on the brake before I start it, it stays out then as soon as I release my foot off the brake it comes back on. I’ve looked on the interweb and apparently when this occurs there is a ground wire that is damaged yet I haven’t found a damaged wire yet. Cheers, Beau Quote Share this post Link to post Share on other sites
*Glenn* 854 Report post Posted February 25, 2010 There might be another bulb that isn't working... check park lights, indicators, brake lights and fog lights Quote Share this post Link to post Share on other sites
m_power 0 Report post Posted February 25, 2010 (edited) There might be another bulb that isn't working... check park lights, indicators, brake lights and fog lightsJust checked all the other lights. They are all fine, every light works.The error message says "Brake LT circuit" Edited February 25, 2010 by BBS-RS Quote Share this post Link to post Share on other sites
*Glenn* 854 Report post Posted February 25, 2010 Just checked all the other lights. They are all fine, every light works. The error message says "Brake LT circuit" Thats a faulty brake light switch... not a bulb... fit a new brake light switch. They have dual curcuit (4 pin) one curcuit is for ABS the other for rear brake light bulbs Quote Share this post Link to post Share on other sites
m_power 0 Report post Posted February 25, 2010 Thats a faulty brake light switch... not a bulb... fit a new brake light switch. They have dual curcuit (4 pin) one curcuit is for ABS the other for rear brake light bulbsThanks for your help Glenn.They are located just above the brake pedal aye? Quote Share this post Link to post Share on other sites
*Glenn* 854 Report post Posted February 25, 2010 If your brake system is hydro booster with master cylinder on the L/H side, its behind the glove box Quote Share this post Link to post Share on other sites
m_power 0 Report post Posted February 26, 2010 If your brake system is hydro booster with master cylinder on the L/H side, its behind the glove boxCheers,Just for general knowledge, how come all the brake lights work if the brake light switch is faulty? Quote Share this post Link to post Share on other sites
jochen 4 Report post Posted February 26, 2010 Cheers, Just for general knowledge, how come all the brake lights work if the brake light switch is faulty? If the switch contacts are corroded / dirty / worn or if the 2 sets of contacts are now switching at the same time, you get this problem. Replace it with a new one - not 2nd hand - because the 2nd hand might be in the same condition as yours. Cheap and easy to replace, just do it and stop worrying about why it failled or how it failled. Remember, it is nearly 20 years old so it lived a good life Quote Share this post Link to post Share on other sites
