I noticed recently the temp on my Scanguage which is normally solid on 85/86 degrees C suddenly when under load towing or beach driving it moves up to 89/90. Then not towing and driving on the beach it hit 99/100 and i pulled up and it worked back down to 85/86. I don't watch the Toyota guage as even with the temp moving up and down the standard guages are rubbish as they don't show bugger all movement.
I had a look and the thermo fan on the front of the condenser was not running and doesn't seem to turn on at all. What fuse does that run off or how do i check. I only say this as i have a Commodore as well and the second the Aircon is on the thermofan kicks.
Secondly how do you check the viscous fan is locking up properly as i would have expected to her it roaring as it crept up.
Thanks in advance