2002 Sportsman 700 Headlights come on steady at first then start flashing like a slow strobe after just a few minuts of running ,tailight stays on speedometer light stays on just the headlights both hi and lo keep flashing, not the switch already checked with test light flashing is before the switch. Heard it might be a resitor but don't show one in my schematic.

On 2002-2004 models, the fuse panel is located on the front frame member underneath the front fender cover.
The center cover under the front rack is removed to gain access to the fuse panel as well as the radiator.
I find it easier to unplug the headlights and remove the front rack for this.

Get one of these... you WILL need it..

Polaris Sportsman 600 700 800 Series 2002 2010

Hey Peter,
Sounds like the temperature sensor/fan control has gone bad...

Search Results Page 1 of 2 Clymer Manuals Polaris Sportsman 600 700 800...

you answered your own question

Gary, Faulty fuel pump sending unit. Most of the forums I checked say this a big problem with Polaris, most say the pump and sending unit have to be bought as a assembly.
Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

08 800 sportsman fuel gauge not reading correctly

Guide to Servicing the Fuel Pump Gauge Regulator 2006 Sportsman 700 EFI

Polaris Sportsman 700 fuel gauge fix

Inaccurate Fuel Gauge Fix Flashing Fuel Indicator

They're not compatible - officially. May just depend on how willing you are to make it work. Either way - the 2002 Polaris Sportsman 700 shows as only being compatible with the 2002, 2003 and 2004 Sportsman 700 & 600 - both models both years. Now - they look pretty close, but if you cross check (Looks like Polaris did a mid-model swap or something). There are (2) frames listed for the 2002 Polaris Sportsman 500 -
First Option - built before 9/3/01 Part # 1013325-067
01 - 02 SPORTSMAN 400
01 - 02 SPORTSMAN 500
01 WORKER 500

SECOND OPTION/AFTER 9.3.01 1013729-067
- JUST THE 02 SPORTSMAN 500

I attached the link to the schematic for you to see. To do a cross reference, copy the part number instead of pressing it (clicking on the part # a lot of the times doesn't show you full compatiblity). Then on the top banner, click OEM Genuine Parts, Polaris, ATV - there will be a parts search bar on the right hand side - paste your part # there and click search. If there are group compatibilities that they've added over time you'll see more than one 'where used' - just click on each one if you have to, but you'll see all compatible models.

copy part number
go back to page one of OEM Polaris parts
paste in search box
click on 'where used' in red to the right of the listing. If more than one - notate each as you go - but you'll see everywhere it was used. I've got a frame from a 2000 Polaris Expedition 425 4x4 with swingarm attached - I'd sell basically for shipping cost on ebay - if you're close to North Florida and in the area - I'd give it to you for $50, FYI. Here's a link to the listing and pictures in there - looks like a copy of the sportsman. If you get to zooming in on both and this looks like a match let me know. And a lot of parts were interchangeable for years on top of years from some parts - check out my ebay store (It's not finished but a lot of parts are on their) subscribe as a follower - and I'll give you 30% off your first order as a Thank You. I price to sell and compete, by the way - free shipping on almost everything - and all you have to do is shop around on there to see where I stand. 17 South Industries, LLC - I could use some help just gettting the name out there and word of mouth. All the best - Good Luck

2002 Polaris SPORTSMAN 500 ALL OPTIONS A02CH50 Parts

eBay Store 17 SOUTH INDUSTRIES:

http://stores.ebay.com/17-SOUTH-INDUSTRIES

your engine is idling to fast
slow down the idle

poor ignition switch water when inside

I have a 2004 700 carb that shut off while riding and then would start up 3-5 minutes later after many nights working on it Ifinally figured it out no help from any dealer. There are 2 circuit breakers under the front rack mine were very rusted, Replaced both never had the problem again. My situation was always only when the lights were on.
Hope this helps