Owners manual power winch 603

check link below GOOGLE answer
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Bad electrical control system. A kind of voltage regulator. Id try to get a repair manual. Or you may find part numbers in owner's manual if not available, try manualslib.com A starter alternator repair shop may be able to help.

If your wiring a remote control to the winch or inside control,,, 4 solinoids type,,make sure the solinoids have ground on the brown wire(warn)...if you don't have a ground all it will do is click,,,even if power is applyed

it requires one hot & one ground, unless the previous owner modified it. then you will have to post pictures for aid.

Bad ground or check the power to the winch if it has power the motor went bad

My issue with a quad i owned had the same issue. The prior owner added a winch and attached the power wire to the lights. When i turned the lights on it turned off unless i gave it some gas while turning the lights on. I disconnected the winch and i was ok. Is the fuse proper amp, bad ground or any new electrical additions? I would take a meter reader and start checking where the power source comes in and goes out like a regulator.

Here's the owner's manual - it includes wiring & installation information:

http://mediacdn.shopatron.com/media/mfg/4377/media_document/4398/10991.pdf

If you're looking for information that is not provided in the manual, you should contact Superwinch directly:

In the USA:

Superwinch, Inc.
Winch Drive
Putnam, CT 06260
U.S.A.
Tel: (860) 928-7787
Fax: (860) 963-0811
e-mail: [email protected]

Elsewhere:

Superwinch, Inc.
Unit D, Union Mine Road
Pitts Cleave Ind Est
Tavistock, Devon
PL19 OPW England
Tel: 44 (0) 1822 619222
Fax: 44 (0) 1822 615204
e-mail: [email protected]

I hope this helps & good luck!

From the owner's manual for that model, see link below also, page 299 of the PDF has a nice picture.

Spare Tire Removal
Fit the jack handle extension over the drive nut. Use the
Lug Wrench to rotate the nut counter clockwise until the
spare is on the ground with enough slack in the cable to
allow to pull the tire out from under the vehicle.
CAUTION!
The winch mechanism is designed for use with the
jack extension tube only. Use of an air wrench or
other power tools is not recommended and can
damage the winch.
When the spare is clear, tilt the retainer at the end of the
cable and pull it through the center of the wheel.

http://www.jeep.com/en/owners/manuals/index.html?year=2006&nameplate=Grand%20Cherokee