Rob_B 0 Posted March 2, 2005 when i give the engine some welly, the battery light will start to glow and the needles will skip about. started to get worse and worse. just replaced the battery. any ideas on this? the idle is also a little iratic its a 91 G60 Quote Share this post Link to post Share on other sites
G60Jet 1 Posted March 2, 2005 Have you changed the brushes on the alternator, only a few wuid to do, will cause the battery to charge badly too. Quote Share this post Link to post Share on other sites
Rob_B 0 Posted March 2, 2005 no i havent. where would you get these from? Quote Share this post Link to post Share on other sites
G60Jet 1 Posted March 2, 2005 any motor factor, GSF, even the dealers, its a white block that screw onto the alternator, should be around £10 Quote Share this post Link to post Share on other sites
stevemac 0 Posted March 2, 2005 Voltage regulator - we sell em, "cheap as chips" Quote Share this post Link to post Share on other sites
Rob_B 0 Posted March 2, 2005 i guess its cheaper than replacing the alternator!! will give it a go i think. cheers G60JET, i knew someone would lead me in the right direction! Quote Share this post Link to post Share on other sites
Rob_B 0 Posted March 2, 2005 do you keep the voltage regulators in stock then steve? is this to do with the alternator? Quote Share this post Link to post Share on other sites
bcstudent 0 Posted March 3, 2005 is this to do with the alternator? Yeah, it's part of the alternator - the voltage has to be regulated as the load on the alternator is not constant and neither is its output, which is directly proportional to the speed of the engine. The rectification is to convert the generated AC into DC. A defective regulator/rectifier will cause the exact symptoms you're experiencing, as stevemac said. A higher voltage across the resistive temperature and fuel instruments allow more current to flow in the heater coils of the gauges, making the readings unstable. If the problem isn't fixed there's also the possibility of the battery exploding as you're boiling the diluted acid inside. This is, obviously, a worst case scenario. Quote Share this post Link to post Share on other sites
Rob_B 0 Posted March 3, 2005 right o then!! shall be sorting this 2nite if i can! where abouts is the regulator with regards to the alternator? i would presume that it is attached to the alternator? would you recommend getting some new brushes aswell? i would imagine thi wouldnt hurt if i did Quote Share this post Link to post Share on other sites
Supercharged 2 Posted March 3, 2005 Its the bit on the side of the alternator with BOSCH written on it and 2 screws, I'll stick a pic up later if your still having probs locating it... Quote Share this post Link to post Share on other sites
coolrado 0 Posted March 3, 2005 like this, i thing the regulator comes with the new brushes soldered into it found this on page 21 of this pdf it also explains how to test and dismantle the alternator http://volkswagen.msk.ru/vw_doc/vw_corrado_90.zip Quote Share this post Link to post Share on other sites
Supercharged 2 Posted March 3, 2005 Here it is... Quote Share this post Link to post Share on other sites
Rob_B 0 Posted March 4, 2005 good ol boys! i think i may have sorted it with a new voltage regulator. the clocks sometimes bounce around tho. i would say it happens with bumps so im guessing that there is a dodgy connection somewhere? it affects both the rev counter and the speedo so is there a common wire for bothy or am i needing to look somewhere else? Quote Share this post Link to post Share on other sites
