Question about Cars & Trucks
Changed alternator still getting light on diagnostics code p065b generator control cicuit
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Posted on Jan 02, 2017
Hi, I can't tell you exactly what is wrong because there is too much involved at this point, what with 2 shops working with it, but I can give you some advise on what else to check. On the alternators and the wiring that supports them a small volt charge is taken off one of the slip rings, where the brushes ride, for the purpose of turning out the light. As I remember, this is a yellow wire that runs back to the dash.
To the alternator, it would be one of the wires that plug into the side of the alternator case.
Posted on Nov 27, 2008
if the number missing from the code is a zero it would be your maf sensor. the first thing to try is just to reset it. unhook your battery for about ten minutes... hook it back up again. incidentally this could reset the battery light being on... doesn't always work... if it doesn't let us know we will forward other solutions
Posted on Apr 07, 2009
i seen this same problem with a Toyota Tacoma.the starter was drawing the battery down all the time .we replaced the starter with no more trouble.
Posted on Jun 18, 2009
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Sep 21, 2017 | Ford Cars & Trucks
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How did you test battery and charging system?
Your charging system is computer controlled. Check for applicable trouble codes. To check codes yourself, at the least you need an obd2 code reader that will check manufacturer specific codes as well as po codes.
Take wire connector loose from generator . The two wires on the left should show battery voltage, do they? What is the voltage spec? This is with key off and no charger hooked up.
The two wires on the right are to and from the computer, To check those, at least, you need a digital multimeter that has a duty cycle or frequency setting, with engine running, should activity on both wires. You have a battery temp sensor that could cause problems.
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It takes corrective actions by adjusting the regulated voltage.
It performs diagnostics and driver notification
Load Shed 2 Start
Less Than 10.9 V
Battery has a net loss greater than 12 AH
Rear defrost, heated mirrors, heated seats cycled OFF for 50% of their cycle. The BATTERY SAVER ACTIVE message will be displayed on the DIC.
You have a charging problem or battery problem !
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