Here's a Labeled Fuse Diagram for the 1500

Edit: I have since updated this information. For far more comprehensive information on the RAM 1500 fuse panels please see this thread and this website.


I was installing a Dash Cam and a Radar Detector in my new 1500 yesterday and I needed to find a fuse with constant power and one with power only when the engine was running to tap into. It's ridiculously difficult to locate specific fuses on the internal fuse box because they're labeled so poorly in tiny black-on-black characters and hardly any are labeled.

So, I decided to take the time to label each fuse location for future reference. It's very useful so I'm posting it here if anyone else can use it. It's always good to know where each fuse is and what it does especially if one blows while you're on the road RVing or on vacation.



This is from a 2021 1500 Limited but it should be close to other 2019-2021 1500's as well with some fuses added or missing depending upon what options you have.

You can find a description for each fuse starting on page 460 of the owner's manual. I've also included this info as an attachment below. If you store this on your smartphone or print it out and keep a copy in the truck, you'll have a much better reference for the fuses if you ever have any problems.

THANKS! Nice job. This was for a 5.7 Hemi?

KlatuBaradaNikto said:

THANKS! Nice job. This was for a 5.7 Hemi?

Click to expand...

Yes, but I think they may use a standard fuse box on all 5th Gen 1500's. Some of the fuses may be missing or added but the locations would be the same.

Well I looked at mine which is a 2018 and this layout is different then mine. Color and Amp fuses crazy one year model change and they are different

Sent from my SM-G781V using Tapatalk

dale197338 said:

Well I looked at mine which is a 2018 and this layout is different then mine. Color and Amp fuses crazy one year model change and they are different

Sent from my SM-G781V using Tapatalk

Click to expand...

Yes, that makes sense. This would be for 5th Gen only i.e. 2019-2021.

Great post, thanks for taking the time to compile the information.

Thank you. I’m installing blackvue camera system. What fuse locations did you use?

Awesome work. I know that I kind of messed this up, but I pulled the list from my 2021 Ram 1500 Bighorn and put it into Excel, then condensed down to one page and converted back to a PDF. Everything should be mostly the same as your list. Most importantly, one could print off these two pages back-to-back and to fold up the 1-pager and stick in your glove box.

Due to file size, I had to compress it down so hopefully is still readable. See attached.

Vincent Sajkowski said:

Thank you. I’m installing blackvue camera system. What fuse locations did you use?

Click to expand...

For most Dashcams, you need either ACC or IGN power (your choice) and optionally, constant 12 VDC.

For normal Dashcam operation, the ACC or IGN power turns the dashcam on. The ACC (accessory) is on in either ACC or IGN modes and alternatively, the IGN (Ignition) is on only when the engine is running. I chose to use IGN power because I didn't see any need to run the Dashcam in normal operation when the engine wasn't running. For this, I tapped into Fuse F20 which only supplies power when the engine is running.

Many Dashcams also provide an option to continue to record for a while after you park and leave. This is to protect your truck when it's parked. For this option, you need constant power even when both ACC and IGN are off. There is usually a special cable for this option which also provides low voltage protection so it won't kill your battery. For constant power, I used F54A. Fuse 54 has both an A and a B position. A is to the left, B is to the right. A provides constant power, B provides ACC/IGN power.

It's also interesting and important to note that RAM used three different types of fuses in the Internal Fuse Box.

They use Micro2 Fuses, Micro3 Fuses, and MCASE+ Fuses. So, if you want to stock some spares, you'll need all three types.

Finally, if you want to tap into an existing fuse, you'll need a Micro2 Fuse Tap. I would not recommend tapping into the Micro3 or MCASE fuses.

A lot of people don't know how these work as they can be confusing. Basically, they allow you to tap 12VDC power from an existing fuse location and send it to an added-on accessory. They provide a socket for two fuses. One is for the existing OEM fuse and the second is for the added-on accessory. Both fuses operate totally independently of each other. If the accessory fuse blows, you won't lose power to the OEM circuit and vice versa.



These taps may be wired differently so carefully check the instructions that come with it, but usually, the upper fuse socket is for the new fuse while the lower socket is for the OEM fuse. Be very careful not to confuse the two sockets, especially if you're using say a 5 amp fuse for the new accessory and the OEM fuse is say 20 amps. You would not want to swap the two.

Also, keep in mind that these taps can only be plugged-in in one direction. If you plug it in backward, the OEM fuse location will still work properly, but the tap will not provide fused protection to the new accessory. If the instructions that come with the tap are not clear about this, and they're often not, you'll need a VOM meter to see which side of the fuse the power is coming from and match it correctly to the proper terminal of the tap.

Not all fuse locations may have the room to accommodate these taps. And you should try to use a fuse that is not critical to the operation of the vehicle in case the tap comes out or becomes defective.

Here is more detail if the above post was not clear enough.



If you're tapping into a Micro2 Fuse socket, always align the Fuse Tap's 12 V Line Input prong with the 12 V live side of the fuse socket. To determine which side of the fuse socket is live, remove the fuse and then use your voltmeter probe to test each side for 12 VDC. The voltmeter's positive lead is the probe, clamp the voltmeter's negative lead to any chassis ground. Be aware that you may need to turn on the ACC or IGN before you read 12 VDC on specific fuses.

I've had several requests to make a diagram for the External Fuse Panel as well. In doing so, I learned a lot more information about the fuses and power distribution panels in these 5th-Gen trucks. So, I compiled it all in one handy reference guide and posted it here. The information in that post is more up-to-date and more comprehensive than the info here so it supersedes this thread.

HAL9001 said:

Edit: I have since updated this information. For far more comprehensive information on the RAM 1500 fuse panels please see this thread and this website.


I was installing a Dash Cam and a Radar Detector in my new 1500 yesterday and I needed to find a fuse with constant power and one with power only when the engine was running to tap into. It's ridiculously difficult to locate specific fuses on the internal fuse box because they're labeled so poorly in tiny black-on-black characters and hardly any are labeled.

So, I decided to take the time to label each fuse location for future reference. It's very useful so I'm posting it here if anyone else can use it. It's always good to know where each fuse is and what it does especially if one blows while you're on the road RVing or on vacation.



This is from a 2021 1500 Limited but it should be close to other 2019-2021 1500's as well with some fuses added or missing depending upon what options you have.

You can find a description for each fuse starting on page 460 of the owner's manual. I've also included this info as an attachment below. If you store this on your smartphone or print it out and keep a copy in the truck, you'll have a much better reference for the fuses if you ever have any problems.

Click to expand...

You did such a very good job that I decided to create a PDF also to make the information easier to see while looking at where each fuse is. Hope you don't mind that I used your diagram. You cannot find much out there on this... as I searched so much and found very little on the 5th Generation Internal Fuse Panel. Now the information is in tables right next to the diagram in the PDF file for easier viewing.

csnetsurfer said:

You did such a very good job that I decided to create a PDF also to make the information easier to see while looking at where each fuse is. Hope you don't mind that I used your diagram. You cannot find much out there on this... as I searched so much and found very little on the 5th Generation Internal Fuse Panel. Now the information is in tables right next to the diagram in the PDF file for easier viewing.

Click to expand...

I'm not sure why you didn't retain the Fuse Type information from my tables. There are four different types of fuses used in the RAM 1500 5th Gen Internal and External fuse panels. It's important to know which type to buy or to stock as a spare if any one should blow. In the case of the MCASE and MCASE+ fuses, it's probably not a good idea to swap out different fuse types even though an MCASE fuse might fit into an MCASE+ slot and vice versa. They have different electrical characteristics.



Here are the fuse type descriptions from my RAM 1500 5th-Gen Power Distribution Centers website:

RAM 1500 5th-Gen Power Distribution Centers

RAM 1500 5th-Gen Fuse Types

It is important to note that RAM used four types of fuses in both the External and Internal fuse panels. The tables on this website precisely document which type of fuse is used where.

RAM included some spare fuses in the External Fuse Panel. These are shown in the diagrams. The Internal Fuse Panel contains no spares. If you want to carry spare fuses, you may wish to buy all four types. The differences in the various types can be esoteric. An explanation is provided below for clarity.

Micro2:




These are used in both the Internal and External Fuse Panels. They may look a bit like other blade-type automotive fuses, but due to their physical dimensions, they are incompatible. These are fast-blow fuses used for quick protection. Micro2 fuses have a current rating range of 5 to 30 Amperes.

Micro3:




Micro3 fuses are basically a double Micro2 fuse. They are easily identified because they are longer and have three prongs. These are used only in the Internal Fuse Panel. They're available in current ratings of 5 to 15 Amperes. The Micro 3 Fuse is designed to protect 2 different output circuits from a single power source. Power flows into the fuse via the middle prong and out via the 2 outside prongs. The fuse ampere rating applies to both output circuits.

RAM also used some Micro3 fuse sockets to give owners a choice of circuits. For example, Fuse 54 is a Micro2 style fuse plugged into a Micro3 socket. The "A" side (to the left) is used for constant power whereas the "B" side (to the right) is used for IGN power. This is why there is a Fuse 54A and 54B, although you can only select one side or the other.

MCASE (Unslotted-style):




MCASE are cartridge-type fuses designed to withstand inrush currents via a time-delayed action. They have a miniaturized footprint for optimal performance in a minimal space. They're available in current ratings of 5 to 40 Amperes. These are used only in the External Fuse Panel.

MCASE+ (Slotted-style):




MCASE+ fuses include a slotted-style MCASE-style format that can handle more current than standard, unslotted MCASE fuses. MCASE+ are also designed to withstand inrush currents via a time-delayed action. They are available in current ratings of 15 to 60 Amperes. These are used in both the External and Internal Fuse Panels. The Internal Panel uses no standard MCASE fuses, only MCASE+ slotted, whereas the External Fuse Panel uses both MCASE unslotted and MCASE+ slotted.

MCASE+ appears to be a trademark of Littelfuse for their specific line of MCASE style fuses. Littelfuse also makes unslotted MCASE+ fuses that are compatible with standard MCASE fuses. Additionally, standard MCASE unslotted fuses might fit in an MCASE+ socket, and vice versa, but be aware that there may be different ambient temperature and time delay characteristics, so swapping them is not recommended unless in a pinch.

Additionally, I don't mind anyone copying, printing, or even modifying any of this for their own personal use, that's exactly what it's for. But please don't publish it anywhere else under a different author or company. The photo diagrams, the greatly expanded fuse descriptions, and the included web links are all unique to this website and copyrighted.

The reason for this is so that no one else can take possession of it in a paid publication. This has happened to me twice before on other things I've published for free by none other than Apple and Yamaha. I lost control of those and now people have to pay to use them. Boy, could I tell you some amazing, almost unbelievable, and even historic stories about that.

I want this to always remain readily available free of charge to all RAM owners.

csnetsurfer said:

You did such a very good job that I decided to create a PDF also to make the information easier to see while looking at where each fuse is. Hope you don't mind that I used your diagram. You cannot find much out there on this... as I searched so much and found very little on the 5th Generation Internal Fuse Panel. Now the information is in tables right next to the diagram in the PDF file for easier viewing.

Click to expand...

I did not realize that the fonts were so blury, so I fixed the PDF.

HAL9001 said:

Additionally, I don't mind anyone copying, printing, or even modifying any of this for their own personal use, that's exactly what it's for. But please don't publish it anywhere else under a different author or company. The photo diagrams, the greatly expanded fuse descriptions, and the included web links are all unique to this website and copyrighted.

The reason for this is so that no one else can take possession of it in a paid publication. This has happened to me twice before on other things I've published for free by none other than Apple and Yamaha. I lost control of those and now people have to pay to use them. Boy, could I tell you some amazing, almost unbelievable, and even historic stories about that.

I want this to always remain readily available free of charge to all RAM owners.

Click to expand...

I totally agree with you!... BTW: Awesome work! I looked forever to find anything on the internal dash fuse box and this was the very best! I just wanted to also help 5th Generation RAM people out as well!

Has anyone been able to fuse tap the MCASE fuse? I'm trying to tie my underbody lighting to the courtesy light. I know how to do it with old school blades but not MCASE fuses. The goal is to not splice or affect any factory wires so I don't void my warranty.

Charles Allen said:

Has anyone been able to fuse tap the MCASE fuse? I'm trying to tie my underbody lighting to the courtesy light. I know how to do it with old school blades but not MCASE fuses. The goal is to not splice or affect any factory wires so I don't void my warranty.

Click to expand...

Any luck finding an answer?

Very helpful, what fuse did you end up using for the radar detector?