Steelslinger

None of them will say they fit Can-Am Defenders because its a niche market and the manufacturers don't list everything they will work on due to liability. But anything with H11 designation will work as that is an industry standard for bulb/connectors. 

https://www.amazon.com/BEAMTECH-Headlight-Fanless-Extremely-Conversion/dp/B072JC755L/ref=sr_1_1_sspa?dchild=1&keywords=beamtech+h11+led+headlight+bulb&qid=1635965628&sprefix=beamtech%2Caps%2C222&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyMzdIWlI3SUI5UEhFJmVuY3J5cHRlZElkPUEwOTc3ODU0MVUzV0ZaN1c4WlZKMCZlbmNyeXB0ZWRBZElkPUEwMzcwMDY5Mkw2NE9KV0ZTWkJSOSZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

Depends on the one you buy. The kit I linked, you install the light at the back, run wiring up to dash, put the microswitch in the shifter area per instructions. Anytime you put shifter lever into Reverse, light comes on.

Other ones, you have to use a manual dash switch to turn them on/off.

Might need to check axle length differences too.

I have a '19 HD10 Max Cab XT which came with OEM Arched Arms, with the S3 Springs and running 30x10x14 QuadBoss QBT846 tires on stock rims.

You can find tons of used OEM arched arms on the many Can-Am Defender facebook groups from people that went for aftermarket arched/forward arms if you want to keep it on the least expensive side. Otherwise, you could add 2" bracket lift, or buy said aftermarket arched arms.

With S3 Springs and arched arms (I'm not sure if your model came with the stock arched arms) or S3 Springs and a bracket lift will easily get you on 30" tires.

I use a Samsung Galaxy Tab A 8" tablet with OnX Offroad maps, Avenza, and Google Maps. I mounted it to the header where the radio goes using Ram Mounts.

Bad fuel would be my first thought if it started right after you filled it up. I'd drain the tank and get good fuel from a different source than the last fill up and see what it does.

Beamtech H11 fanless. Should be about $35usd on amazon. Two sets, hi and low beams.

Just S3 springs all the way around. XTs have arch a arms as the newer models do.

Same tires on all four using stock rims. Front windows are powered and roll all the way down. Defenders have u-joints on the driveshafts. You can get and install a remote oil filter adapter and use spin on filters.

Can Am will not have a gasket for a third party built audio roof. You could call/email Audio Formz and see what they have or recommend. Otherwise, you can look at getting rubber or foam rubber weather stripping from the hardware store or auto parts store.

This guy has a kit with a microswitch that attaches to the shifter so the lights come on when you put it in reverse:

https://marqcadeng.com/shop-mce-offroad/ols/products/can-am-defender-rear-bed-light-kit-plug-and-play

Not running a limited, but have '19 Max Cab XT. I haven't tuned it so far, but replaced the Primary and Secondary Clutch Springs with ones from EPI Performance (CAPS2/QRS2, inexpensive mod at $60) when I up'd my tires to 30x10x14 QBT 846s. In normal mode I've had it up 57mph (seems to be accurate according to GPS), never really pushed it all the way out, mostly run in Eco mode when around town. The throttle response is a ton better at takeoff than stock. RPMs are decent, not wound out real bad. I may or may not tune it in the future, pretty happy with it so far. 1700 miles on it at this point.

2020+ models have 10hp up on my '19 and I've read a lot of good reviews of these machines being tuned.

The amount of space inside is really nice, turning radius for that big of machine is great, and options on how to set it up is killer (Spring/Summer as a trail and yard maintenance machine, Fall its a hunting rig, and winter life a plow truck).

Only real dislikes are the back door windows don't roll down (which isn't a huge thing, but disappointing), 650 amp stator (Limiteds have 850 amp), and too many rivets to remove skid plates. With my ATVs, I liked to take them off once a year to really clean out the under side. Soon I'll just pull them all and replace with rivnuts and/or aftermarket skid plates.

Is it no power to Solenoid, or no power to winch, or winch isn't working when you hit the switch?

Yes, I believe it is a standard 'Power Block' that they use through out the machine.

Check your vent lines from the gas tank. Make sure the lines are clear and located away from the cab. Also double check that you don't have any leaks around the fuel lines and injectors.

I was able to look over a 2021 limited at my local dealers. The solenoid is under the hood and under the black cover at the front.

I changed the Primary and Secondary springs after I went up to 30" tires. Got them through EPI Performance, CAPS2/QRS2.

Has nice response and RPMs aren't insane. Cost me $56

Can you follow the wires from the switch or the winch back to the solenoid? Not many places it could be in these things. 

What part is holding you up? Or rather, what doesn't match up?

I haven't tackled this yet and I don't have a Limited, just 19' Max Cab XT, but I'll offer what help I can

Are you using the online install instructions?

This one looks to be the Defender one:

https://instructions.brp.com/content/instruction-sheet/en_CA/e-instruction-details.html#googtrans(en)&articleNo=kA00c000000yHMYCA2&lang=en&title=SSV KIT - DEFENDER OUTSIDE EUROPE TRAXTER EUROPE ONLYPLOW LIMIT SWITCH&rel_part_number=715006259

I've heard its made by Super Winch

Check fuel filter if you haven't already.

Make sure when starting in Park that the indicator on the dash says P, sometimes even if the shifted is in Park, it doesn't click in the transmission so you either ha e step on the brake or rock the machine forward until it clicks, then start it.

The back wall has tons of openings where the dust gets sucked in. I used the Kilmat66 insulation and tape to close off all the holes I could, it cut down on a lot of the dust getting inside. You also need to make sure your doors are aligned real well and close up tight.

I don't have a picture of it, but I used a hidden antenna and put it on the back inside of the roof, above the liner and behind the roll cage.

https://www.amazon.com/gp/product/B07CNMDTY8/ref=ppx_yo_dt_b_asin_title_o08_s00?ie=UTF8&psc=1

It seems decent, best rated that I had found. Haven't fully tested it out yet as there aren't a lot of radio stations I like in my area.