Mercury Repair Questions? Ask a Mechanic for Answers ASAP
Hello my name is ***** ***** I will be assisting you with all of your vehicle questions today. Give me one moment while I review your question and come back with a answer. Please be aware I do not know your skill level or abilities so I will be asking a lot of questions and in a lot of cases we will respond to each other quite a lot before we find a solution. As far as phone calls are concerned that is the system prompting you, not me, and they do cost more money, I prefer text but in some cases a phone call is required.
Can you elaborate on the over charging and what voltages your getting?
Sounds like a bad regulator in the alternator, but here are some system checks to verify its not something else
1. Access the alternator connectors. Backprobe the Black/Yellow (BK/YE) wire on the 2 wire connector. Monitor the voltage on this circuit when the problem is occurring. The BK/YE wire should maintain full charging system voltage at all times and is fed from fuse #11 15A in the engine compartment fuse box. If the voltage is low when the problem is occurring, repair the circuit and recheck operation. Also verify the terminal connections between the harness and voltage regulator are clean and tight.2. If the voltage on the BK/YE wire is good, monitor the voltage on the output terminal of the alternator, again when overcharging, to verify it shows the same voltage as at the battery. If the voltage is different, repair the circuit and recheck operation.3. If both circuits show the correct voltage but the alternator is simply overcharging, suspect a faulty alternator.
that would indicate there is a fault in the wire itself and it would need to be repaired and retested
the black should be ground and red for probe,
this is why were doing the testing, its prob a bad alternator,