I have taken meter readings and wondered if anyone else can shed some light on this as it may not be the alternator at fault as I decided to check the central drain plug and removed the ECU (Engine Control Unit) plastic box and wondered if something could have been upset in doing this (I was careful when I put it back)
Taking readings to earth from the two connectors in the lead(plug end) they are as follows:
Outer pin to Earth: 5.4KOhms (at the point is shows 200)
Central Pin to earth: 3.50KOhms (the point being '20')
Across the pins: 3.5kOhm
I found that reversing the leads made no difference.
Alternator readings:
Outer Pin to earth: out of range
Central Pin to earth: 2.96KOhms(again the point being '20')
Across the pins: 1019KOhms
Reversing the leads showed different results:
Outer to earth: 1024KOhms
Centrai to earth: 2.96k
across pair: out of range (diode in line perhaps?)
The Auto diesel has different reading and I wonder if it shows a problem with the manual (above) readings anywhere?
Lead:
Central to earth: 11.51Kohms
Outer to earth: 5.2kohms
across pins: 11.52Kohms
reversed leads:
central to earth: 7.42kOhms
outer to earth: 5.2kOhms
across pins: 7.43kOhms
Alternator:
Outer to earth: out of range
central to earth: 3.27
across pins: out of range
swapping leads
Outer to earth: 1059Kohms
Central to earth: 3.27KOhms
across pins: out of range
Am a little confused with the across pins readings as it shows a reading for a blip but then goes to out of range on my meter.
If anyone can advise on this issue as I do not want to take the thing off the 75 unless I have to as reading online it seems to be a pig of a job.
Cheers, Jim