Battery charge problems

I have a Volkswagen Amazon cart of 82 this cart better than a 4x4 did not give me problems like the other one that I have until one day I stopped turning on the light of the battery board I thought it would be that the LED had been burned but the LED had not been downloaded distributor cables and my digital multimeter brand of everything except a stable reading some idea that may be

Greetings Firefox, the common diagnosis with the voltimeter is to measure the voltage in the battery (approximately 12.6V) with the engine off, then proceed to measure with the engine on (it must reach approximately 13.8V), if the reading differs from this there are problems in the alternator, a low voltage can indicate various damages from brooms, rotor, regulator, diodera ... A high voltage is usually damage to the regulator. From what you indicate there is damage to the alternator, command to check it and tell us. Greetings.

I agree with Wolfi everything points to a damage in the alternator so that more explanations Wolfi already told you all luck.

Thanks for answering so fast. They are what they tell me but for my work I will do it on Saturday on Monday