peugeot alternator problems

[tonyryan]

Hi Guys need some experienced brains to help me with a problem.
I have a Peugeot 208 1.2 5 Door hatchback 2015.
I have been having a charging issue with the car and first thought was battery. I took the battery for testing and was told it was in good working order.
I then purchased a re-manufactured alternator to be fitted by local mechanic. This did not solve the problem and he said it was because it wasn't an original equipment alternator. So i went to dealers and bought another alternator at three times the price, this also didn't solve my problem. When the plug is removed from the back of the alternator it will send 14.01 amps to the battery, when I plug it back in this drops to 12 volts and below.
Is this a common fault? Does anyone know what is causing this variation?

[tonyryan]

Thanks for the prompt replies guys
The original problem was the battery kept going flat so i presumed the battery was goosed. Had that tested and told all good.
The mechanic said to take it autoelectrician who wants £100+ to diagnose so thought i would try get advice first from here.
The reading is from the battery with the engine running.

[tonyryan]

Sorry the plug is the one that goes into the back of the alternator

[tonyryan]

The plug wire goes to the engine management unit, mechanic said he cant test it because it is wave forms and needs special tester.

I just begrudge paying £100 for someone to plug in a tester on a single wire was just wondering if there was a common fault on these cars

[tonyryan]

BMI and EMU both reset, so far everything is running fine and no light. Thanks for the advice guys

Edited by tonyryan on Wednesday 24th April 16:17