If you're scratching your head trying to find the 2017 ram 2500 block heater location, you're definitely not alone because these things are notoriously tucked away where you'd least expect them. It usually happens on the first morning the temperature drops below freezing; you go out to plug in your truck, and suddenly you realize you have no idea where the cord is—or if you even have one. Let's get straight to the point: on the 6.7L Cummins diesel, the heater element itself is located on the passenger side of the engine block, tucked in right behind the oil filter and near the turbocharger.
Now, finding the element is one thing, but finding the cord is another battle entirely. Most 2017 Ram 2500s come from the factory with the heater element already threaded into the block, but Chrysler didn't always include the actual electrical cord unless the original buyer checked a specific box on the order sheet. If you're lucky enough to have the cord, it's usually bundled up and zip-tied somewhere near the passenger side headlight or tucked down by the frame rail near the radiator.
Where to look if you can't see it from the top
If you pop the hood and look down past the air intake, you probably won't see much besides a maze of hoses and wires. The best way to actually see the 2017 ram 2500 block heater location is to go in through the passenger side wheel well. If you pull back the plastic liner or just peek over the top of the tire with a good flashlight, you'll see the side of the engine block.
Look for a circular plug with two or three pins—that's your heater element. It sits in a frost plug port. If there's a wire attached to it, follow that wire! It usually runs forward toward the front bumper. If you see the pins but no wire, well, you've found the heater, but you're missing the "juice" to get it running. Don't worry, though; buying the cord is a lot cheaper and easier than trying to install the whole heater assembly from scratch.
Why the cord is so hard to find
RAM was pretty clever (or annoying, depending on how cold your hands are) about hiding these cords. They often zip-tie them with black plastic ties that blend in perfectly with the rest of the wiring loom. I've seen them tucked deep inside the bumper, wrapped around the tow hooks, or even shoved behind the passenger-side fog light housing.
The idea was to keep the cord protected from road salt and debris during the summer months, but it makes for a frustrating scavenger hunt in December. If you're searching for it, look for a thick, black rubberized cord. It'll have a standard three-prong male plug on the end, usually covered by a little plastic cap to keep the prongs from rusting. If you find a mystery bundle of wires near the radiator support, give it a gentle tug. If it's the heater cord, it'll usually have a bit of slack.
What if the cord isn't there at all?
It's a common misconception that every Ram 2500 has a functioning block heater ready to go. While almost every 6.7L Cummins engine has the heater element installed in the block at the factory, the cord was often a $50 to $100 option. If you've looked everywhere—the wheel well, the bumper, the frame rails—and you just see the bare pins on the engine block, you'll need to buy an aftermarket or OEM cord.
The good news is that installing the cord is a breeze. You just plug the female end onto the heater element (it's a threaded collar usually, so you'll want to make sure it's snug) and then route the wire to the front of the truck. Just be careful to keep the wire away from the exhaust manifold and the turbo. Those parts get incredibly hot, and they will melt your new cord in about five seconds if it's touching them. Use plenty of heavy-duty zip ties to keep it secured to the frame or existing wiring harnesses.
Testing to make sure it actually works
Once you've found the 2017 ram 2500 block heater location and located the cord, you might want to make sure it's actually doing something before you rely on it for a -20 degree morning. You can't really "hear" a block heater working, although sometimes you'll hear a very faint "hissing" sound similar to a boiling kettle if the environment is dead silent.
The most reliable way to test it is with a digital multimeter. Set it to measure Ohms (resistance) and touch the probes to the two flat prongs of the plug. You're looking for a reading somewhere between 18 and 30 Ohms. If you get a reading of "OL" (open loop) or infinity, either the cord is bad or the heating element itself has burnt out. It's way better to find this out on a Saturday afternoon than at 5:00 AM when you're trying to get to work.
When should you actually plug it in?
There is a lot of debate on this, but generally, most diesel guys suggest plugging in your 2017 Ram 2500 when temperatures consistently stay below 10°F or 15°F (-10°C). Sure, the Cummins is a beast and will usually start in much colder weather, but it's hard on the batteries, the starter, and the engine internals.
Plugging it in for about 3 to 4 hours before you plan to drive is usually plenty. You don't really need to leave it plugged in all night long; it just wastes electricity once the block reaches a certain temperature. A heavy-duty outdoor timer is a life-saver here. Set it to kick on at 3:00 AM, and by 7:00 AM, your coolant will be warm, your oil will be thinner, and the truck will fire up like it's the middle of July. Plus, you get cabin heat much faster, which is the real win.
A quick note on the 6.4L Hemi engines
While most people asking about the 2017 ram 2500 block heater location are driving the diesel, there are plenty of 6.4L Hemi 2500s out there. On the gas engines, the heater is usually located on the driver's side of the block, toward the rear. The Hemi doesn't always come with the heater element pre-installed like the Cummins does, so if you don't see a cord or a plug, you might actually need to have the heating element knocked into a frost plug port. It's a bit more of a project than the diesel, but it's definitely worth it if you live in the "frozen north."
Keeping the cord safe
Once you've found your cord, don't just leave it dangling out of the grill all winter. The wind will bounce it against your paint, and the road salt will corrode the prongs. A lot of guys like to buy a "bumper plug" or a "NOCO port." These are little weather-proof outlets that you mount directly into your plastic bumper or air dam. You plug your heater cord into the back of it, and then you just plug your extension cord into the front. It looks way cleaner, keeps the connection dry, and saves your paint from getting scratched up.
Finding that cord can be a pain the first time, but once you know where that 2017 ram 2500 block heater location is, you're all set for the winter. Just remember: passenger side, back of the block, and check those zip ties! Stay warm out there.