2012 RAM Electrical Issues?

[JUMARTZ]

MY 2012 ELECTRICAL ISSUES CAME ALL AT ONCE.

• No exhaust brake indicator
• No horn
• No signal lights
• No tow/haul
• No wiper

The new TIPM did not have any effect; $600 down the toilet!

Any ideas?

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[watersupply189]

Any codes?


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[JUMARTZ]

The scanner indicates that it is unable to communicate with the truck.

I am trying to find a common point of connection or signal.

The truck was an Air Force Fire Chief vehicle, and it has only 95,000 miles on it.

Almost ready to sell it cheap!

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[watersupply189]

The scanner indicates that it is unable to communicate with the truck.

I am trying to find a common point of connection or signal.

The truck was an Air Force Fire Chief vehicle, and it has only 95,000 miles on it.

Almost ready to sell it cheap!

It's impossible to know what they did to it.

Have you checked all fuses and all the grounds?

Have you done a load test on both batteries?

If you have one battery that is low or bad, that would cause all kinds of havoc to the electrical system.

Recommend replacing both batteries, even if only one is faulty.

Please keep us updated.


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[JUMARTZ]

It has been a reliable vehicle since November 2020.

I put new batteries in two years ago.

Will check them today.

I am scratching my head on this one.

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[watersupply189]

It has been a reliable vehicle since November 2020.

I put new batteries in two years ago.

Will check them today.

I am scratching my head on this one.

Yeah, electrical gremlins can be a nightmare.

Check the batteries, all fuses, and clean all grounds to ensure they are making good contact.

Also, check all your wiring harnesses for rodent intrusion.


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[AK Bob]

The scanner indicates that it is unable to communicate with the truck.

I am trying to find a common point of connection or signal.

The truck was an Air Force Fire Chief vehicle, and it has only 95,000 miles on it.

Almost ready to sell it cheap!

For the scanner, if there is no communication issue, I would start at the DLC and test the CAN lines as described in the 2012 service manual on page 886.

The complete service manual is available for free download at https://www.igotacummins.com/threads...Service-Manual

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