Why fan dont work - 2000 Suzuki VZ 800 Marauder

Check for broken wires, Or if that is not the problem fan could be burnt out. Also check if there is a separate fuse for the fan.

turn on a/c if they still dont come one unplug and use jumper wires to ck fans if they dont work replace both fans if fans work ck fuse and relays if fuse and relay have power ck pcm/ecm

wiring issue,possible fan fuse blown when it stopped working...or need replacement fan

fans
1. oil the bearings,sae 30 or wd40 for places you cant get into.
dont take fan motor apart unelse you realy have to.

dont let your fan motor bearings get worn egg shaped from lack of oil.
2. make sure fan blades not hitting or scraping fan housing and fan blades are securely fastened to fan motor shaft.


3.mr heater fan motor is 12 volts DC , so it may have a segmated comutator and brushes.


I dont know because i have not yet needed to take my mr heater
fan motor apart but i have worked on hundereds of ac fan motors
in the past 65 years.
4. keep fan motors from getting wet. they hate water.
5. keep fans clean, they dont like foriegn materials.


Your specific problem: first fan 2 weeks,second fan 2 months.


how much you use them, are you wearing the brushes down?
Getting fan motor wet? foreign material getting pulled into fan or fan motor? off/on switch work ok. batterys good,battery contacts ok? fan transformer 110 vac to 12 vdc good? fan bearings oiled?
need more info to diagnose properly.
all of the above needs to be checked out to tell whats happened.
fan & fan motor needs to be inspected.

Most systems work pretty much the same. First check the fans themselves by hot wiring them to the battery. If they work, you need to check the engine temp sensor (some vehicles use one for gauge and fans, others use a separate one for fans) relay, and of course any fuses.
You will help yourself a lot by getting either a chilton or haynes manual to show you how to do testing.

all the fan assembly's were new.I finally got a good one that lasted:)You could try a junk yard new they are about $ 110

DID YOU CHECK FAN SWITCH PLUG OUT THE FAN SWITCH THE FAN SHOULD COME ON JUST TO VERIFIY TAKE A WIRE FROM RED(PLUS)+ AND THE OTHER SIDE TO THE PLUS OF THE FAN . IF FAN COMES ON WITH THE WIRE THE FAN SWITCH IS AT FAULT.

First test the fans themselves. Then if the fans do work, trace your wiring back to find where power is lost.
Are there any service codes?

REPLACE THE FAN THAN SHOULD BE FINE BUT IF THE FAN WORKS AND SHOWING THE RED RING OF DEATH YOU XBOX IS F******

check the power connection for your mother board and fan