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2007 dodge ram 2500 6.7. Just installed rebuilt alt. not…

Customer Question
2007 dodge ram 2500...

2007 dodge ram 2500 6.7. Just installed rebuilt alt. not charging. check gauges light on

Mechanic's Assistant: Just to clarify, what are the exact lights you're talking about?

Check guages

Mechanic's Assistant: Are you fixing your Ram yourself? What have you tried so far?

Trying

Submitted: 10 months ago.Category: Dodge
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Answered in 1 hour by:
10/1/2017
Dodge Mechanic: Gabriel Grey, Auto Service Technician replied 10 months ago
Gabriel Grey
Gabriel Grey, Auto Service Technician
Category: Dodge
Satisfied Customers: 451
Experience: Master Service Technician
Verified
Good evening, my name is ***** ***** I would be happy to help you out.Does the battery light turn on when the truck is running? And have you checked battery voltage when the engine is running?
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Customer reply replied 10 months ago
no
Dodge Mechanic: Gabriel Grey, Auto Service Technician replied 10 months ago

Do you have access to a voltmeter?

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Dodge Mechanic: Gabriel Grey, Auto Service Technician replied 10 months ago

We need to check for signal at the alternator. There should be a 12v signal, 5v signal and a ground signal, if it is missing any then the alternator will not engage.

Is it an aftermarket rebuilt alternator?

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Customer reply replied 10 months ago
Alt is rebuilt. How do I check 12 and 5 v
Customer reply replied 10 months ago
I know how to use a meter
Dodge Mechanic: Gabriel Grey, Auto Service Technician replied 10 months ago
To check for the signal you will need to unplug the connector at the alternator when the engine is running. From there check each pin and record the readings. The ecm input will be the 5v signal, the ignition input will be the 12v signal and then you will need to make sure we have a good ground signal as well
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Dodge Mechanic: Gabriel Grey, Auto Service Technician replied 10 months ago

Any update on this? Were you able to get things figured out? Let me know if you have anymore questions about it!

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