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GTD Rev counter not working
by
numbnuts
on 13 Aug, 2007 09:39
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Hi guys, i have traced a broken wire down to the red/ black on my aternater. Does anyone know which terminal it should be soldered onto? There seems to be a choice of 3 on the alternater, if its possible to make out on the pics.....
Hope someone knows as i really want this working. :?
Thanks alot, Joel
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#1
by
Demons UK
on 13 Aug, 2007 10:18
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Duno if these help mate but?
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#2
by
Vincent Waldon
on 13 Aug, 2007 11:06
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Yup, the tach is driven off the W terminal which is usually a red/black stripe wire with a spade lug (rectangular push-on).. the other two (B+ and D+) are circular bolt-on connectors.
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#3
by
numbnuts
on 13 Aug, 2007 13:59
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#4
by
Vincent Waldon
on 13 Aug, 2007 14:52
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Ah... the broken wire is *inside* the alternator....
I believe it matters not which of the three terminals internally you go to (although you may be able to detect remnants of the broken wire)... basically it's just picking up one of the 3 phases from the diode bridge.. probably doesn't matter which phase.
I have an alternator schematic with the W terminal labeled... will edit this post if I can find it.
Vince
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#5
by
numbnuts
on 13 Aug, 2007 15:07
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Yeh, i was willing to give it a go on any of them and find out if it worked :lol:
My mate said he wouldn't hold it on though whilst the engine was running :lol:
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#6
by
Vincent Waldon
on 13 Aug, 2007 15:42
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Someone I know was timing a gasser and thought you twisted the crankshaft pulley to adjust where the mark was (rather than the distributor) while the engine was running...after all, it looks like it's standing still when being illuminated by a timing light.
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#7
by
Vincent Waldon
on 13 Aug, 2007 18:55
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Here's the alternator schematic:
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#8
by
numbnuts
on 14 Aug, 2007 09:12
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Thanks alot, i am about to solder it when it stops raining :roll:
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#9
by
Vincent Waldon
on 14 Aug, 2007 09:20
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Which, in England, will be sometime next summer ??!!!! :lol:
Vince
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#10
by
numbnuts
on 14 Aug, 2007 14:11
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you are not wrong :roll:
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#11
by
zooky
on 14 Aug, 2007 18:10
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what kind of output is 'W' putting out, I was getting a constant 9VAC. Am I looking for a Hz output?
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#12
by
Vincent Waldon
on 14 Aug, 2007 18:48
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Yup, it's a sine wave at about 10x the frequency an ignition system would be putting out... hence the difference in the tach/cruise/oil warning systems between diesels and gassers.
Vince
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#13
by
Jimmy Diesel Junior
on 29 Nov, 2008 13:21
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hi all i fitted vw taco into my mk2 but they're not working. If i have a w-terminal on my alternator, how do i connect this to my taco to get it working?
?
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#14
by
Jimmy Diesel Junior
on 30 Nov, 2008 10:17
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anyone know about this??? cheers
