No power to the first ignition fuse in the box under hood

SNOWMANBFC

MEMBER
2005 DODGE DAKOTA
4.7L
V8
4WD
AUTOMATIC
230,000 MILES

I think it's the ignition start fuse, but there is power to the rest of the fuses. I was told to replace the computer or ECM or CPU or whatever you want tot call it. I bought a new one and had it reprogrammed. Installed and still nothing. I ran a wire from the battery to the fuse and installed a toggle switch and now it will start and all the lights on the dash will work when I turn the key on. The transmission is in limp mode, no low gear and no high gear. I read that you can re-teach the transmission by turning the key to the second position and press the accelerator to the floor for 30 seconds and then turn the key off. When I start the truck and put it in drive the transmission will work fine for a few minutes and then goes back into limp mode. Have to manually change the transmission between 2nd and drive. Still no low gear or overdrive.

6 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Okay, the power to that fuse comes from the power module or the TIPM. This is a very common failure.

I attached pictures for you of the module under the hood.

I also attached a wiring diagram of the module. The fuses I circled are the ones for ignition.

https://www.2carpros.com/articles/how-to-check-wiring

Roy

REMOVAL

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1. Disconnect the battery negative cable.
2. Remove the Integrated Power Module (IPM) cover and remove the nut (5) from the IPM B+ terminal stud (6).
3. Remove the battery positive cable (4).

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4. Remove the IPM (2) pushpin fasteners (1) from the battery tray (4).

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5. Move the IPM (1) forward and up to disengage the locking tabs (2) from the battery tray locating slots (4).

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6. Lift the IPM up to access and disconnect the wiring harness connectors from the Power Distribution Center (1) and Front Control Module (2).
7. Remove the IPM assembly from the vehicle.

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Friday, November 27th, 2020 AT 11:20 AM

THOMASFAMILY05

MEMBER
3 POSTS
DODGE DAKOTA

1992 Dodge Dakota 5.2L 138K

About a year ago I replaced the distibutor cap, rotor, and pick-up coil. Now I have an intermittent problem with blown ignition fuses. I have since changed the cap and rotor with no result change.
I have had a problem with clicking when trying to start the truck. However each time the truck would eventually start, so I brought a new battery ; problem solved. Many times I would carry multiple fuses (40amps), when one would blow, I could on some occassions, keep putting new ones in until one held. Sometimes the new fuse would last for days or weeks. The last episode lasted for a month; a few blew and they continuing blowing. I parked the truck out in the pasture. Yesterday new fuse in, truck starts and runs great.

HELP PLEASE

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Friday, November 27th, 2020 AT 3:57 PM (Merged)

SGTTSAI13

MEMBER
5 POSTS

Any time the fuse blows there is a short. The short could be wires, the switch, or any other device connected. My suggestion would be to find out where the short is, why its blowing fuses and go from there.

Not really sure on this but do you have the right battery installed, does it have to many cca for that system, unlikely but I would still look at it.

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Friday, November 27th, 2020 AT 3:57 PM (Merged)

THOMASFAMILY05