jmgcordoba

Time ago when I started the engine I could see the red battery light in the dash for some 3-4 seconds or until 30-35 seconds when I started to drive. Couple of weeks ago the red battery light was on all the time. I measured the voltaje in the battery and was around 12V. I recharge the battery and I re installed. Red light continued same, the voltage in the battery with engine running did not reach 13V. I replaced the alternator. Now the voltage in the battery (engine stopped) is 12,72V and 13,95 with engine running, BUT the battery red light continues flashing red! when connecting consumers I see the voltage decreases. I think all kind of things:
i) belt tensión in the alternator. I have replaced the belt. I think is correct tension becasue this car have two belts, this one is for the waterpump and thee alternator, the tighten is made pivoting the alternator, maybe the tension is the problem, I really do not know how to check the tension...)
ii) I have replaced the regulator with the brushes. Same problem
iii) Al the grounding seems to be right.
Please give me any clue or advice. I will appreciate. Thanks in advance

RichieST

iTrader: (2)

What car?

jmgcordoba

Ford Fiesta mk3 1.3 carburator, with servo direction, two belts (water pump & alternator, servodirection)

RichieST

iTrader: (2)

Check for corroded engine earths and condition of battery cables.

You could put a jump lead from battery negative to the engine block and see if it improves.

jmgcordoba

Hi, thank u for your answer.
I can not think the alternator is wrong, for this reason I point to the cabling problem (which I also doubt becasue the connections are aparently right), your advice is a good test, I will do as you mentioned; with a good cable from battery minus to groung. Also my big doubt is the belt tension, becasue I can not tight much more the manual adjustment with the alternator, I have thought to make a wood cradle to insert betwen the alternator and the engine block to tight more the belt.
I will comment u
Best Regards