I've got the same or at least a similar problem with my radiator fan. The low-speed fan kicks in as expected but the high-speed fan never kicks in. But I know it works since I've done the jumper test at both the switch and at the high-speed relay. I have replaced the switch. Maybe the coolant is not getting hot enough for it to kick in -- I'm in Victoria, BC where it never really gets super hot, but I would have thought that going up long hills at highway speed on a hot day (~85 degrees F) should be enough to trigger the high-speed fan. At what temp should it kick in? I've got an infrared temp gun so I could test that. Thanks, Rick On Tue, Sep 5, 2017 at 3:24 PM, Dennis Haynes <d23haynes57@hotmail.com> wrote: > Is the radiator getting hot? For testing the wiring there are three wires > on the fan switch. One is power from the fuse box. That wire jumped to the > middle will give you slow speed. The two outside wires jumped will give you > super-fast high speed. If the fan turns on with the AC than most likely the > fan resistor is good. It is possible you just are not getting the coolant > hot enough to call for the fan. Infrared temp gun can help here. > > Dennis > > > -----Original Message----- > From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf > Of David Bjorkman > Sent: Tuesday, September 5, 2017 1:24 PM > To: vanagon@GERRY.VANAGON.COM > Subject: Radiator fan switch > > Hi all; > Still in SC. replaced the radiator and condenser (after some body work) > and am having trouble with the fan coming on. Turning on the A/C gets > starts the fan, so I know it works, but it won't start when the engine gets > hot. Fuses check out OK. How does one check the radiator fan switch. I > know that I have to jumper something, but not sure what. I would really > like to get this fixed and get back home. > > Thanks; > Dave B. > |
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