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Just put in a new altenator,still only reads 12.56 JA: Sometimes

Customer Question
just put in a new...
just put in a new altenator,still only reads 12.56
JA: Sometimes things that you think will be really complicated end up being easy to fix with Dodge. The Dodge Mechanic I'm going to connect you with knows all the tricks and shortcuts. Tell me a bit more about what's going on so he can help you best.
Customer: altenator was only putting out 10 volts so i replace it,the new one is only putting ou 12.56
JA: Are you hoping to fix this yourself?
Customer: yes
JA: Great! What have you tried so far?
Customer: put a new altenator in it
JA: Is there anything else important you think the Dodge Mechanic should know about your Dodge?
Customer: no
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Dodge Mechanic about your situation and then connect you two.
Submitted: 1 year ago.Category: Dodge
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Answered in 3 minutes by:
5/12/2016
Dodge Mechanic: Chris, Shop Foreman replied 1 year ago
Chris
Chris, Shop Foreman
Category: Dodge
Satisfied Customers: 13,981
Experience: Dodge/Cummins and Chrysler Certified Master Tech
Verified
Hello and welcome to just answer. What is the year, model, and engine of your Dodge? Chris
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Customer reply replied 1 year ago
1989 2500 with cummins diesle
Customer reply replied 1 year ago
are you there
Dodge Mechanic: Chris, Shop Foreman replied 1 year ago
Ah ok. The PCM (computer) on the fender well is responsible for voltage regulation. has that been checked yet? Chris
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Dodge Mechanic: Chris, Shop Foreman replied 1 year ago
Also if the PCM does not see a speed signal from the engine speed sensor above the front crank pulley then it will not allow the alternator to charge. Does the tachometer work? Chris
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Customer reply replied 1 year ago
no how do you check that
Customer reply replied 1 year ago
yes
Dodge Mechanic: Chris, Shop Foreman replied 1 year ago
Hang on and let me see if I can find a diagnostic procedure for you. Chris
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Dodge Mechanic: Chris, Shop Foreman replied 1 year ago
So the tachometer does work? Ok, do this next: get a 12 volt test light and see if there is power on the large stud on the back of the alternator with the engine OFF. Let me know if there is. Chris
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Customer reply replied 1 year ago
yes it lights up
Customer reply replied 1 year ago
you there
Dodge Mechanic: Chris, Shop Foreman replied 1 year ago
Ok good. Now I am seeing different charging systems for the 1989 diesel. Your truck may actually have an old style voltage regulator mounted to the fire wall. I have a picture for you to look at. Click on that link below and locate the voltage regulator in the picture. Tell me if you have one on your fire wall. Here is the link:
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Dodge Mechanic: Chris, Shop Foreman replied 1 year ago
It looks like this:
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Customer reply replied 1 year ago
i dont think so there is two things that plug in in that area but it doesnt look like a regulator
Dodge Mechanic: Chris, Shop Foreman replied 1 year ago
Any way you can take a picture of the fire wall area and send it to my phone?
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Customer reply replied 1 year ago
ill have to do it tomorow after work, gave my camera to my helper to take some pics, you have an e mail, its eiser that way
Dodge Mechanic: Chris, Shop Foreman replied 1 year ago
Ok no problem. Send it to***@******.***. I will keep an eye out for it tomorrow. Chris
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Customer reply replied 1 year ago
thank you send it tommorow
Dodge Mechanic: Chris, Shop Foreman replied 1 year ago
Ok, have a good night! Chris
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Dodge Mechanic: Chris, Shop Foreman replied 1 year ago
Any luck with sending a picture? Chris
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Chris
Chris
Chris, Shop Foreman
Category: Dodge
Satisfied Customers: 13,981
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Experience: Dodge/Cummins and Chrysler Certified Master Tech

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