dag019
Well-Known Member
That was going to be my recommendation as well. The 45amp Lucas is probabaly what it would have had originally. I have just fitted one to the tractor they are about £50 and They aren’t handed as you can move the front plate to suit either orientation.
It’s a 90 - mentioned that but slipped up saying defender… know it’s that tweeney time…
Was reading about 11v - 11.8 with no load then down to 11.2 with all the loads on. Batt is always lower as it flattens it as I drive I suspect!
mystery
Well-Known Member
does the charge warning light work, main harness to engine harness connection ok .if the charge bulbs faulty no excitation same with bad harness connection unless it has a resistor and diode fitted to the loom ,looks like the voltages you are reading are the battery if all above ok then change the alternator
dag019
Well-Known Member
That looks like the lucas alternator I mentioned above. You can get them form nearly everywhere and they are all the same other than price varying. Check the agricultural suppliers for vintage tractors as well as the land rover parts suppliers as they use the same thing.
Bulb not working (it was) but battery dies really quickly. I have two batteries I switch betweeen - one is brand new so both as ok. It’s the alternator I am pretty sure! Thanks
Bulb warning circuit is dead simple, so could be simple wiring fault or as Kenrmitt says the bulb
That won’t stop it charging though will it?
Would that faulty circuit stop the battery being charged by the alternator?
dag019
Well-Known Member
Yes the charge bulb not being present or being blown will stop it charging. It will also run the risk of damaging the regulator pack on the alternator frying itself as there is no bulb to initiate the charge.
replace the bulb and check the voltages again both standing and running. Depending on what the running voltage is will depend on if the alternator is working or not and if you need a replacement, but without the bulb a replacement wont charge either.
