https://club8090.co.uk/w/index.php?action=history&feed=atom&title=VW_Electrics_alternator_checking 2026-04-23T18:28:15Z Revision history for this page on the wiki MediaWiki 1.44.2 https://club8090.co.uk/w/index.php?title=VW_Electrics_alternator_checking&diff=11402&oldid=prev 2012-03-19T13:14:34Z

<p></p> <p><b>New page</b></p><div>&#039;&#039;&#039;Alternator dash light staying on&#039;&#039;&#039; <br /> <br /> http://www.pelicanparts.com/techarticles/914_alternator_troubleshoot/914_alternator_troubleshoot.htm<br /> <br /> Disconect blue wire from back of alternator, dash light should go out, if it stays on there is a short somewhere between alternator and the the dash light.<br /> <br /> ----<br /> &#039;&#039;&#039;TonyTech:&#039;&#039;&#039;<br /> <br /> First up check the connections from battery to Van. Terminals should be bright shiny metal not green or black.<br /> Rub em down, clamp up connectors (not over tight) cover em in vassaline.<br /> Have a look at the engine earths while you are at it.<br /> <br /> Charge the battery overnight.<br /> Check battery voltage with engine off (12V ish)<br /> If reading low battery buggered.<br /> Check battery voltage engine running (14.5V ish)<br /> If low alternator not charging propperly or battery taking too much currant.<br /> <br /> With engine OFF Remove +ve lead from battery<br /> Connect one lead of a test lamp or an ammeter to the battery +ve connect the other lead to the van battery connector.<br /> Does the lamp light or the meter read a currant if so something is draining your battery.<br /> <br /> Keeping the battery warm will increase the power it can deliver.<br /> I&#039;d be wary of keepin it covered as you might trap explosive gasses or accidentaly short out the terminals.<br /> <br /> ----<br /> <br /> <br /> Spoke to a guy yesterday and he said that if I removed the blue wire and earthed it, and the red battery light comes on its an alternator fault, he said that if I earthed the blue wire and didnt get a light it was a bulb/wiring fault...?<br /> <br /> <br /> ----<br /> <br /> Charge your battery overnight and test again.<br /> 12-13V with engine running is a pretty good indicator that the alternator is not putting out charge.<br /> have a look at the back of the alternator and remove the black brush pack.<br /> If the brushes are short ie less than 7mm buy a new pack and see if that helps.<br /> <br /> If the brushes are OK you are looking at a new alternator.</div>

Hacksawbob https://club8090.co.uk/w/index.php?title=VW_Electrics_alternator_checking&diff=1324&oldid=prev 2005-12-01T23:38:20Z

<p></p> <p><b>New page</b></p><div>Alternator dash light staying on <br /> Disconect blue wire from back of alternator, dash light should go out, if it stays on there is a short somewhere between alternator and the the dash light.<br /> ----<br /> &#039;&#039;&#039;TonyTech&#039;&#039;&#039;:<br /> First up check the connections from battery to Van. Terminals should be bright shiny metal not green or black.<br /> Rub em down, clamp up connectors (not over tight) cover em in vassaline.<br /> Have a look at the engine earths while you are at it.<br /> <br /> Charge the battery overnight.<br /> Check battery voltage with engine off (12V ish)<br /> If reading low battery buggered.<br /> Check battery voltage engine running (14.5V ish)<br /> If low alternator not charging propperly or battery taking too much currant.<br /> <br /> With engine OFF Remove +ve lead from battery<br /> Connect one lead of a test lamp or an ammeter to the battery +ve connect the other lead to the van battery connector.<br /> Does the lamp light or the meter read a currant if so something is draining your battery.<br /> <br /> Keeping the battery warm will increase the power it can deliver.<br /> I&#039;d be wary of keepin it covered as you might trap explosive gasses or accidentaly short out the terminals.<br /> ----<br /> spoke to a guy yesterday and he said that if i removed the blue wire and earthed it, and the red battery light comes on its an alternator fault, he said that if i eathed the blue wire and didnt get a light it was a bulb/wiring fault...?<br /> ----<br /> <br /> Charge your battery overnight and test again.<br /> 12-13V with engine running is a pretty good indicator that the alternator is not putting out charge.<br /> have a look at the back of the alternator and remove the black brush pack.<br /> If the brushes are short ie less than 7mm buy a new pack and see if that helps.<br /> <br /> If the brushes are OK you are looking at a new alternator.</div>

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