Can I use halogen plow headlights I was told I need led or it would fry my computer..I have Curtis SNO pro 3000 with older wiring

This suggests the battery, but I have other ideas

https://www.google.com/search?q=2015+Hyundai+Santa+Fe.+One+headlight+flashing

This says it has a standard H8, halogen or LED or HID. If someone has replaced Halogen with either HID or LED, the control circuits can interfere with the car's BCM. Both HID and LED can flash when they are failing.

https://www.google.com/search?q=2015+Hyundai+Santa+Fe+headlight+type

Or you have a loose connection. Power or ground.

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the car has DRL. and DRL does not like what you just did.
daylight running light option.
then the lies of PnP , happens again.
most cars , non lED ,will not work when currents fall so low, with LED added.
the BCM fails or DRL fails. or both.
this is not new ground here.
no VIN TOLD or country

Help in the link.

https://www.google.com/search?q=Curtis+3000+plow+test+solenoid

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Just call a dealr for help n b really careful

Make sure you will have enough ventilation. Most of leds have fan built in

check to see that it has a good ground, and that the wires don't have a break in the middle somewhere or a blown fuse

If you have standard halogen bulbs:

1. Burned out light bulb; or
2. Fried wires between the dashboard wiring harness and the headlight bulb connectors; or
3. Fried headlight bulb connectors.

If you have HEI emitters:

• Failed ballast.

I think you have a problem with the plow motor grounding out. when you raise or turn plow in either direction you have to run the plow motor which is grounded out. ( as in hooking the ground and positive together directly ) the plow is on a gravity drop when you let it down by the weight itself and does not require the motor for the plow to operate. It's your plow motor or the positive feed to selonoids.

This is just an idea, I may be wrong but any input is helpful, right? I would think that the switch that controls the plow lights is designed to alternate between the circuits for the truck light and the plow light. If the trucks headlight switch is turned on then the circuit is closed and turnes on the light. When the plow light switch is turned on it may cut the hot side of the circuit going to the headlight and engage the hot wire to the plow light. The headlight and plow light may share a common ground. If they don't share a common ground then the plow switch may cut the ground wire opening the circuit. If you can't find a solution you can always wire the plow lights directly to the battery with the same switch or a new toggle switch and then turn on the parking lights only on the truck. On most GM cars and trucks there is a space in the fuse pannel that is for a power accesory. It is basically a fuse slot that is empty labeled ACC. This is a 12V hot power source and you would run the positive wire here then ground the neg to the chassis. This way if you forget to shut off the toggle it will cut the hot when the key is shut off. When running the wire it is near the hood release able and you may be able to run the wire thru there and not drill a new hole. I've done this for neon lights under cars as well as stereo systems requiring an amplifier. If you drill a new hole even though its under the hood I would put a little blue RTV silicone over the new hole to prevent moisture from getting past the fire wall or road salt.

Any mechanic can aim your headlights for you , but I would consider buying new bulbs. Even if your car has halogens , they do become less bright over time.
Some of the new bulbs on the market will light up 2 to 3 times as far as older halogens.