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This is a discussion on Overheating within the Wolverine General Discussion forums, part of the Yamaha Wolverine Gen 1 708 cc SxS category; Ok so I had overheating issue fan wasn’t coming on so removed fan jumped fan directly off battery and still did not work bought a ...

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    Overheating

    Ok so I had overheating issue fan wasn’t coming on so removed fan jumped fan directly off battery and still did not work bought a after market fan and installed replaced fan relay also fired buggy up and fan still not kicking on and still overheating ...... any suggestions ?????

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    Supernova Tripplec's Avatar
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    Got a meter? If not get one and check for Voltage, without 12VDC or more it won't run. You may have more than one problem if the fan was faulty and not running and still not with a new one. 12VDC at both fuse tabs is a must.
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    I would pull the rad. cap and see if you have circulation. compare the top and bottom rad. hoses for any temp. difference. Test your thermostat. If you have done any work on the cooling system any air in the system is bad. BURP it. Check for mud on you rad. and oil cooler. Buy an infared temp tester and get some readings. I ran water in the summer(no freeze protection). There are several good products for cooling, most do not provide freeze protection. When I'm done for the day I confirm the temp the fan comes on and off. Good luck. Which machine do you have and what is your overheating temp?
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    Supernova Tripplec's Avatar
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    Clarity and details are extremely important.

    Given his last post if correct. His fan is not running, given that he has to sort out why and a meter is needed for that. Guessing and just looking a fuses etc isn't near sufficient.
    2017 Wolverine RSPec SE
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    >6000 km and going June 22nd, 2020
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    Quote Originally Posted by Baker6420 View Post
    Ok so I had overheating issue fan wasn’t coming on so removed fan jumped fan directly off battery and still did not work bought a after market fan and installed replaced fan relay also fired buggy up and fan still not kicking on and still overheating ...... any suggestions ?????
    Start with the simple trouble shooting things first.

    1. Verify new fan is working. Since it sounds like you already have it installed, disconnect both (+) and (-) connections going to fan, and use additional wire and run (+) wire from fan to straight to battery and do the same for the (-) wire, then just by touching the (-) wire to the battery see if fan comes on, let fan run for a couple of minutes and see if wires get hot, shouldn't. You now know new fan is good.

    2. Pull fuse and check with Ohm meter to verify it is good.

    3. Jumper across sending unit (thermo-electric switch) that triggers fan to come on and see if fan comes on, if it does then you most likely have bad sending unit.

    4. If fan didn't come on in step 3, then use volt meter and test for 12v going in to relay, then check for 12v coming out of relay, still with sending unit jumped across terminals. Machine does not have to be running, just key on.

    5. With electrical connections at fan disconnected, check for short in system with Ohm meter. Check for continuity between (+) wire to ground - (should not have continuity). Do this with jumper wire on sending unit.

    6. Check for continuity at the connector going to fan, in both the (+) wire (connector to relay and relay to battery) and (-) wire going to battery. You could have a wire pulled loose or broken.

    One of these steps will identify the problem.

    On the OEM fan if you reach up in the passenger side front wheel well (using flashlight to see), with key off, and spin the fan by hand a good fan will spin with no resistance and spin very very freely, make no noise, feel very smooth to rotate, and if you spin it reasonably hard by hand it will take several seconds (say 10 seconds or more) to come to a slow stop. If there is any rough feeling in turning the fan blade by hand or if the fan blade stops rotating in just a few seconds (say 3-5 seconds) then the fan is bad. The number of seconds I mention is not a hard and fast rule, I'm just using some reasonable ballpark numbers as examples.

    Let us know what you find out the culprit is.
    Last edited by PapaSkeeta; 04-25-2020 at 10:54 AM.
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    We’re is the thermo electric switch

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    Here is an excellent video on trouble shooting all the components in the electrical circuit (except for the relay) for a fan not working. The video is on a Yamaha Grizzly ATV but the principal will be the same. The culprit will surprise you.



    This is an excellent video on troubleshooting the fan relay on a Viking SxS, which will be the same as the Wolverine.

    Last edited by PapaSkeeta; 04-26-2020 at 12:22 PM.
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    Quote Originally Posted by Baker6420 View Post
    We’re is the thermo electric switch
    I believe in the thermostat housing or right near it.
    Last edited by danielplace1962; 04-26-2020 at 12:58 PM.

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    If I checked the new fan and it works w a power probe but when I pull the relay for the fan and attemp to activate the fan w the power probe from the relay and it don’t work we’re should I look next ??????

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    The ECU activates the fan. Fan wont activate untill 209° or 205°.
    Thermo fuse.
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    Last edited by kdt1970; 05-11-2020 at 06:42 PM.
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