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So I have an 89 patrol with a TD42. I was having trouble with a low charge voltage from my alternator and the bearing was also on the way out so I decided to get a new 100amp one. I ordered one from patrolapart and Baxters A-1401H. First one arrived obviously damaged and would draw 0.24amps through the voltage sense wire. Sent it back and was accepted for return and replacement (didnt get a reason for that yet if it was the outside damage or internal). Just installed the new unit(no damage that I can see so pretty sure it a different one) and it still has the same p draw through the sense wire. I find it hard to believe that I got 2 duds with exactly the same problem.
TLDR: I've had 2 brand new alternators with the same problem of a 0.24amp draw through the voltage sense wire one after the other.
I plan to call baxters to see what they think but I have to wait till after the long weekend.
Any ideas for what I should look for in the meantime would be helpful.
G’day QT Mate,
Yours and mine Old School sense wires might be buggered across to the battery somewhere ?
Can’t remember much else between that wire and our batteries but I am an elecy 12v nuffy
Have you trialled a temporary sense wire line with say alligator clips across to the main battery?
FWIW: QT Mate, I’m still running one……just, after horrid underwater/undersludge ridiculous abuse throughout Tasmania & Vic High Country High Mount 6hp Pimped Warn Winching Saviour
From my understanding the sense wire is just tapped from the main charge wire inside the loom somewhere between the battery and alternator so I'll confirm that there isnt a large voltage drop from battery to alternator.
Either way, without any other wire attached to the alternator and it mounted so its earthed to the engine it should only have a minimal amp draw enough the sense voltage like a normal voltmeter, or at least thats what I would have thought...
Top Feedback Thanks @Daimos Mate
Have never personally had an issue with my slightly older Baxters variants for TD42’s although a nearby Brother/member here @Rossco did have severe parasitic drain issues upon new purchase late last year of not only one but a second FOC replacement merely weeks afterwards. @Rossco Brother what was the final outcome/batch issued mentioned to yourself over the counter ?
FWIW: In regards “electric vacuum’” units for say 4.2 & 6.5 diesels in Patrols, please be cautious of amps required to run such devices as the aftermarket new chosen alternator to fit will need to accommodate electrically too
Robbing Peter to pay Paul, may need 13A squealing belt upgrades doubled with fridges/loads etc…