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Ask Don 'Mo Lurch' Your Own Que...
Don 'Mo Lurch'
Don 'Mo Lurch', Aftermarket & Factory Electronics
Category: Dodge
Satisfied Customers: 20660
Experience:  Cert. Dodge & Chrysler Warnty, Heavy Line Mech, Mobile Electronics. Sales, Installation & Repair for 30 years
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I have a 2000 dodge ram 2500 It has electrical problems Took

Customer Question

I have a 2000 dodge ram 2500
It has electrical problems
Took it to dodge dealer
He changed alternator about $400
Still got problems
Took it to electrical shop
He said may be pcm charged me $60
Took it to dealer they checked it but could not find problem
They dr ove it around for two days $300
I drove it home it acted up on trip home
What it does, sometimes it starts fine runs fine then volt meter goes to 8 volts oil pressure gauge pegs at 110 and check gauges light comes on, engine seems to run rougher and alt seems to get hot, also static in radio.
Other times I turn key on and all lites come on gauges seem normal then when abs lite goes out volt meter goes to 8 volts and oil pressure pegs at 110 van will start but not run good I have removed and cleaned ground from battery to chassis and ground from battery to engine. I checked plugs on pcm and harness to engine they are tight no sign of corrosion. Problem seems to be more consistant when going down hill. Now what
Submitted: 11 months ago.
Category: Dodge
Expert:  Don 'Mo Lurch' replied 11 months ago.

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sorry for the delay............
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Greetings...... “Hi, I’m Don (aka MOLurch) and I look forward to helping you!”
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This issue is typically the ECM
The Voltage Regulator is Internal to the ECM & the ECM Controls the Voltage Regulator
IF the Alternator was Replaced & is working correctly, then Replace the ECM
Knowing the ECM is somewhat expensive, there is a "External Voltage Regulator Kit" sold by some Auto Parts Stores or On-Line, like this:
https://alternatorparts.com/external-voltage-regulator-high-output-alternator-kit.html

This Kit is much cheaper than replacing the ECM, but you need to follow the directions or have someone familiar with this type install

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Expert:  Don 'Mo Lurch' replied 11 months ago.

IF you need more information, please ask "prior" to Rating.
.
Please do the right thing and leave a rating, using the rating system, so I may be credited for this Q&A.
.
NOTE: Do NOT Rate on how much TIME you waited, because I am not on 24 / 7 and I answer as soon as I see the question.
The question will still remain open for follow up questions if needed.
.
If for any reason, you can't rate my answer OKAY, GOOD, or EXCELLENT today.
Please reply and let me know why, so I can help more/better.
.
Rating is very Important to our Service

Customer: replied 11 months ago.
Talked to the people who make the external regulator kit they say this will not help me with this problem
Come on man if you have been doing this
Dodge stuff for years you might have more than this to offer
Ill never buy a dodge again what else can you think of for this problem
Expert:  Don 'Mo Lurch' replied 11 months ago.

You came here for an answer
The ONLY answer is:
The Voltage Regulator is Internal to the ECM & the ECM Controls the Voltage Regulator
IF the Alternator was Replaced & is working correctly, then Replace the ECM

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so give me a break...........IF you do not like the answer, spend some more $$$ & have another Shop or Dealer "look" at it & charge you more for the "same answer"
Do you really think there is some magical answer that you can just take the ECM apart & fix the issue, then reinstall it?
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I have NO access to your vehicle & can only go by what you post.
The issue is very common & your description is as basic as anyone elses
The problem is the ECM
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Sorry to waste your time & mine

good luck