Unsworth Posted August 15, 2009 Share Posted August 15, 2009 Hi all.. Nearly finished my 200tdi into a 2.5TD 90... I want to use the Disco alternator.. And I had to cut the original plug off of the 2.5turbo item. The wires I have are 2 x big brown wires and one smaller red one.. How do I wire these to the Disco alternator.. Also If I want to re-use my old 2.5td alternator I would have to re-connect the lucas plug.. I didnt really take notice which way the wires were and am confused with the Brown wires.. Both are the same and I dont know where to connect each one??? Both big brown wires have NO markings on them so I dont have a clue... Can I just wire any of the brown wires to eachother?, If I got the wrong wires.. Would the alternator blow up like a bomb in a Lethal weapon movie?. Thanks.. Matt Quote Link to comment Share on other sites More sharing options...
western Posted August 15, 2009 Share Posted August 15, 2009 2 x brown wires together onto B+ terminal the small wire to WL or IND terminal [charge light wire] Quote Link to comment Share on other sites More sharing options...
paul the plumber Posted August 16, 2009 Share Posted August 16, 2009 2 x brown wires together onto B+ terminalthe small wire to WL or IND terminal [charge light wire] is correct if you had not cut off plug the old one would have gone straight back on. never mind at least you will now next time Quote Link to comment Share on other sites More sharing options...
Unsworth Posted August 16, 2009 Author Share Posted August 16, 2009 is correct if you had not cut off plug the old one would have gone straight back on. never mind at least you will now next time I had to cut the plug off to take the loom off my old engine.. I couldnt get it off without taking the plug off. But I left 3 inches of wire on the plug so I can re-connect it Quote Link to comment Share on other sites More sharing options...
Guest noggy Posted August 16, 2009 Share Posted August 16, 2009 Plus you want to keep the disco alt because its 100amp Quote Link to comment Share on other sites More sharing options...
Unsworth Posted August 16, 2009 Author Share Posted August 16, 2009 Plus you want to keep the disco alt because its 100amp Are they?. Isnt a 90-110 one 65amp?.. If so I will wire up the Disco alternator.. If that doesnt work I'll get one from the scrap yard! Quote Link to comment Share on other sites More sharing options...
western Posted August 16, 2009 Share Posted August 16, 2009 Plus you want to keep the disco alt because its 100amp No it's not. Microcat shows Discovery 200Tdi alternator is a 65amp A127 unit RTC5681 Quote Link to comment Share on other sites More sharing options...
CURLY Posted August 17, 2009 Share Posted August 17, 2009 i just did exactly the same to my old 2.5 td. changed the old spade type alternator for one with bolts on. if you look at the back of the old spade alternator, where both the big brown wires plug into, they are infact joined together anyway, so like Western said in a previous post, wire both big brown wires into the B+ terminal on your disco alternator, (the biggest bolt connector, it will be marked with a B+) and the small red wire, that goes onto the smallest of the 3 bolt terminals which should be marked with D+ or just D. dont worry about the W terminal, thats just if you have a rev counter. HTH CURLY Quote Link to comment Share on other sites More sharing options...
Unsworth Posted August 17, 2009 Author Share Posted August 17, 2009 i just did exactly the same to my old 2.5 td. changed the old spade type alternator for one with bolts on. if you look at the back of the old spade alternator, where both the big brown wires plug into, they are infact joined together anyway, so like Western said in a previous post, wire both big brown wires into the B+ terminal on your disco alternator, (the biggest bolt connector, it will be marked with a B+) and the small red wire, that goes onto the smallest of the 3 bolt terminals which should be marked with D+ or just D. dont worry about the W terminal, thats just if you have a rev counter. HTH CURLY Thanks I understand it all now Quote Link to comment Share on other sites More sharing options...
CURLY Posted August 17, 2009 Share Posted August 17, 2009 Thanks I understand it all now are you sure? just to recap.. you connect the 2 big brown wires to the blah blah terminal, and the small red one to the hoojamaflip jobbie.. but guess what, you dont need to connect anything to the W badongde because thats for the rev counter.. LOL CURLY Quote Link to comment Share on other sites More sharing options...
western Posted August 17, 2009 Share Posted August 17, 2009 are you sure? just to recap.. you connect the 2 big brown wires to the blah blah terminal, and the small red one to the hoojamaflip jobbie.. but guess what, you dont need to connect anything to the W badongde because thats for the rev counter.. LOL CURLY don't confuse him anymore cos you'll regret it later Quote Link to comment Share on other sites More sharing options...
Unsworth Posted August 18, 2009 Author Share Posted August 18, 2009 Problem was that my alternator doesnt have any markings on it despite being a lucas item .. Plus was also caked in S*** .. I got a photo from a mate with a Disco, He took a photo of the back of his alternator but was baffled by the "W" terminal as I forgot the disco had a rev counter! Oh well you learn new things every day Quote Link to comment Share on other sites More sharing options...
Unsworth Posted August 18, 2009 Author Share Posted August 18, 2009 are you sure? just to recap.. you connect the 2 big brown wires to the blah blah terminal, and the small red one to the hoojamaflip jobbie.. but guess what, you dont need to connect anything to the W badongde because thats for the rev counter.. LOL CURLY Remember... No one likes a Smart A*** :P :P Quote Link to comment Share on other sites More sharing options...
Ex Member Posted August 18, 2009 Share Posted August 18, 2009 No one likes a Smart A*** :P :P I do. Quote Link to comment Share on other sites More sharing options...
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