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Jonnyround2003

Battery Light

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Had a new battery fitted 2 my 2b with ford Sierra parts the battery light used to go out when over 3000 revs now it won't iv checked the alternator and its working but not charging the battery any ideas peaple

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iv checked the alternator and its working

What alternator please? Most have two or three wires.

 

A big one from B post to the positive of the battery. Check its continuity and resistance. Ford went through a phase when they put a length of fuse wire in this lead. You can't see it, only test it.

 

Second wire runs from battery pos to ignition light, through and out to 61/D/L/WL/I terminal on the alternator and may do duties just for the ign light or may also excite the field coils. Check it by removing it from the alternator, switch ignition on but don't start the engine. Your multimeter should show some volts at its end.

 

Third wire if you have one is an ignition live and should show 12 volts at its alternator end with the ignition on.

 

Don't start the engine with any wires removed from the alternator.

Ignition light should go out at less than 1000rpm.

Edited by Longboarder

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The alternator has no make just love going to it then one other that looks like it goes to the battery light I have power to it from the battery it's only a few years old the battery could it just be the regulator

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It could be the regulator. rarely when that fails you can get normal battery light behaviour apart from glowing as you increase revs. But to help you need to identify the alternator, what connections it has and test each rather than guessing what it might be. Look at the picture below of the connectors and choose your alternator.

post-21-0-23416900-1527418215_thumb.jpg

Edited by Longboarder

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Iv done a diode test and it's well out the reading not sure it worth trying just to change them

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If you are getting 12v on the B lead and the D lead with ignition on then it is probably easier to get a replacement alternator from the scrappy and swap them out.

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