Badger90 Posted August 10, 2009 Share Posted August 10, 2009 i am trying to fit A tachometer to my 200tdi defedner... and not winner.. the instuction i got a w**k!!! can any shed some light before it get dark? cheers sam Quote Link to comment Share on other sites More sharing options...
LittleBlue88 Posted August 10, 2009 Share Posted August 10, 2009 If your lucky,there should be a spare terminal on the back of the alternator marked w+,use that to give the pulse to drive the tacho. Other wires should be simple enough Quote Link to comment Share on other sites More sharing options...
western Posted August 10, 2009 Share Posted August 10, 2009 just do a search for rev counter, there's lots of info on how to connect/fit to a 200tdi Quote Link to comment Share on other sites More sharing options...
LandyManLuke Posted August 10, 2009 Share Posted August 10, 2009 You need to have bought a tacho suitable for use with diesels engines, in that there is no coil to produce a signal to drive a common petrol tacho. You need to connect the tacho feed to the W terminal on your alternator, then supply it with the same switched power and illumination feeds as the rest of the dash instruments. oh, and as already said (plenty of quick replies) this has all been covered recently. Quote Link to comment Share on other sites More sharing options...
western Posted August 10, 2009 Share Posted August 10, 2009 http://forums.lr4x4.com/index.php?showtopi...;hl=rev+counter http://forums.lr4x4.com/index.php?showtopi...;hl=rev+counter http://forums.lr4x4.com/index.php?showtopi...;hl=rev+counter http://forums.lr4x4.com/index.php?showtopi...;hl=rev+counter http://forums.lr4x4.com/index.php?showtopi...;hl=rev+counter those 5 threads should keep you occupied for a little while Quote Link to comment Share on other sites More sharing options...
Badger90 Posted August 10, 2009 Author Share Posted August 10, 2009 yeah i sploke to dad and he there should be terminals on the alternator and there was so wired it on and it worked.. byut on tick over the rev counter sits at 3500rpm lol.. i im guessing i got the wrong one lol cheers chaps Quote Link to comment Share on other sites More sharing options...
western Posted August 10, 2009 Share Posted August 10, 2009 there might be a adjuster screw or slid switches on the rear of the rev counter, idle should be around 750 to 800rpm & max revs at standstill [no load] is 3850rpm. Quote Link to comment Share on other sites More sharing options...
Badger90 Posted August 10, 2009 Author Share Posted August 10, 2009 yeah there is a slider switch "1,2,3,4,5,6,8" and i have have it on 1. but it still sit at 3500rpm.. Quote Link to comment Share on other sites More sharing options...
western Posted August 10, 2009 Share Posted August 10, 2009 try different settings & you should find a suitable position. Quote Link to comment Share on other sites More sharing options...
zardos Posted August 10, 2009 Share Posted August 10, 2009 yeah there is a slider switch "1,2,3,4,5,6,8" and i have have it on 1. but it still sit at 3500rpm.. That number is probably the number of cylinders, you have it set to a 1 cylinder engine. Set it to 4 (3500/4 = 875) which is about the correct idle speed. Quote Link to comment Share on other sites More sharing options...
Badger90 Posted August 11, 2009 Author Share Posted August 11, 2009 yeah. the higher the number goes the higher the idle sits.. just got a email back from chap i bought it off.. i just got a email back from the chap i bought it off he said its for petrols only... and his admited that he didnt put anythink on the page to say it was for petrols only.. so he going to take it back.. after all that buggering about lol.. cheers guys. Quote Link to comment Share on other sites More sharing options...
LandyManLuke Posted August 11, 2009 Share Posted August 11, 2009 As said, Diesel and Petrol tachos work in completely different ways. A 'Petrol engine' tacho takes a feed from the coil, and will need to know the number of cylinders the engine has, where as a 'Diesel engine' tacho works off one of the unrectified phases of the alternator, the frequency of which is not explicitly related to engine speed, as different engines will have different ratio drive pulleys. As such, a petrol engine tacho will have a switch to select the number of cylinders, where as a diesel engine tacho will likely have coarse selection switches and a fine tune pot (adjusted with a small screwdriver) to set the scaling between alternator and engine speed. Quote Link to comment Share on other sites More sharing options...
Badger90 Posted August 14, 2009 Author Share Posted August 14, 2009 right.. i sent the old one back. got my new one. the right one. and got it wired in and working.. i adjusted the screw and it fell to bits.. now its not working at all.. im not having much luck with these bloody things lol... and when the hell did layout change on here? cheers sam Quote Link to comment Share on other sites More sharing options...
western Posted August 14, 2009 Share Posted August 14, 2009 and when the hell did layout change on here? while you were busy dismantling the rev counter last night actually the forum had a big update, see the thread in the international forum Quote Link to comment Share on other sites More sharing options...
Badger90 Posted August 15, 2009 Author Share Posted August 15, 2009 while you were busy dismantling the rev counter last night actually the forum had a big update, see the thread in the international forum im impressed..soo much better.. good job chaps Quote Link to comment Share on other sites More sharing options...
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