Year of Manufacture *: 2000
( Optional ) Engine Code or CC: NGD 2000cc
If my memory serves me correctly cooling fan running continually indicates a management problem, I've scoped the the three pins on the alternator and this is the results, pin 1 battery volts, pin 2 pulse width modified square wave with pulse width lengthening with electrical load, pin 3 battery voltage. I know from the test literature I have pin 1 should be a constant square wave and should be connected back to the ECU, but my problem is that according to Autodata only pin 2 connects to the ECU and both pin 1 & 3 connect to the instrument panel anybody got any info on the wiring?
Funny thing is charging is fine and PWM signal is responding to load.
Mark
P.S. I've tried a new Lucas brand alternator and the results are the same, we fitted a new ECU a couple of weeks previous to this fault occurring, original fault was no primary switching on ign coil circuit A.
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