Where's the risk? 1) Take alternator off Mk4. Put in safe place. 2) Put Mk2 alternator on Mk4 & start. 3) Type result & await further input.
Just been outside to have a look, and the only problem is my Mk4 is an AUM, which has a rounded plug on the alternator, and the early AGU one on the MK2 has the square 2 pin plug, so not interchangeable.
They are right. You have one there that you know works. It will prove the problem one way or another. I think you are putting hurdles in the way.
Indeed, this is getting drawn out in an epic wishbone thread style. I suspect Richard is actually a "conceptual E artist" and his works grow on t'internet as people interact and add their views, all adding to the organic natural free form manifestation of his vision. I get such a charge reading his threads. And by the way, get rid of this image in the first post as it is bollox and holds limited value in a true technical environment!
Was only asking for help Dan, just like everyone else on the forum does ? Wiring isn't my speciality, which is why i started this thread in the first place. All the help so far has been great, and now the wiring is sorted, its narrowed down to being the alternator by the looks of it. I think ive done good so far as the whole conversion was up and running in a couple of months, just with a few little problems which need sorting, which is only the alternator charging and the fan. The alternator was bought off ebay, so i have no history of it what so ever! It could have done alot of miles and may have been dodgy from the start. As for the pic above, there is only one wire which is wrong on there. When i was told to splice a wire into the blue exciter, i had already wired the alternator up the same way you do on an 8v, hence the extra blue one in the pic above from the alt.
Absolutely, I understand that. But that image is probably what caused the issues in the first place as it is wrong. So many things about it are misleading. EG, the blue line (is it a wire?) does not go to the positive terminal of the battery, it should connect to the blue wire coming from the engine bay loom around the battery area, it comes from the fusebox and is the dash alternator warning light / alt exciter feed. And it does not connect to a separate terminal on the alternator body, it should go to D+ which is housed in the two pin plug on your type of alternator. Old type alternators had the blue wire going to a separate terminal though. Running an alternator not connected as it should be can damage them. Two wires need connected, larger one (usually red) from M8 eyelet terminal on alt to battery side of the starter solenoid (also M8 eyelet), then the small blue wire from D+ to the loom, that is all.
Just noticed the blue wire going to the + terminal which is most definitely wrong! I have wired it up as you've said above Dan, so im guessing its definitely a faulty alternator. I could well have damaged it first of all when it wasn't wired in properly ? Doh. Or it could have been faulty in the first place. I'll update once its sorted as we have all gone through everything it could be. Cheers for the help Dan and everyone else
Muppet6699 kindly popped over to mine just now and tested my alternator with his voltmeter. Turns out the alternator is knackered so i'll need a replacement or may get my current one recon'd. Cheers for the help everyone
No worries Rich, the alternator was outputting approx 2v (in comparision to my alternator outputting 13.8v. It definately sounds like a knacked alternator.
Thanks again for that mate Im going to try Sahibs autos in Hangerlane tomorrow and see if they have a recon'd one in stock. They are quite good there as ive been there in the past and got a great service. Do you know of any others near us ?
Bought a reconditioned alternator today. 100 all in which isn't too bad tbh. I'll be fitting it tomorrow so hopefully it'll solve my problems.
The new alternator is working perfectly now Cheers for the help Pritesh (muppet6699) and everyone else in the thread. Just need to sort out the fan not kicking in now. Im sure its the switch, as ive bridged the fan and that works perfectly, and the bottom of the rad near the switch is very hot. I'll order a new one and see what happens.
Fan is sorted now, turned out my fan switch had died out of the blue. Popped into GSF yesterday and picked one up for 9
