MARK2842 Posted April 2, 2023 Share Posted April 2, 2023 Trying to wire a switch on my 98 ch613 to manually turn eng fan on. Any help please. Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/72678-help-installing-fan-over-ride-switch-on-ch613/ Share on other sites More sharing options...
mechohaulic Posted April 2, 2023 Share Posted April 2, 2023 "98 kinda new for me, back in the day of the horton fan clutch they were air operated having a shutterstat controlling air flow. it took air to disengage the fan. made that way should there be an issue with lack of air the fan stayed on. to put in a over ride meant installing a switch going to output side of shutterstat. keepin mind this was before all the computer/ module / back feed stuff now. Quote Link to comment https://www.bigmacktrucks.com/topic/72678-help-installing-fan-over-ride-switch-on-ch613/#findComment-528363 Share on other sites More sharing options...
mechohaulic Posted April 2, 2023 Share Posted April 2, 2023 what model fan is on your engine ?? viscous fan fluid controlled Quote Link to comment https://www.bigmacktrucks.com/topic/72678-help-installing-fan-over-ride-switch-on-ch613/#findComment-528364 Share on other sites More sharing options...
Joey Mack Posted April 2, 2023 Share Posted April 2, 2023 did you pull the center dash panel to see if the plug is already there? hopefully the labels didnt fall off.. if you find the plug. look at the white wire and write down the numbers on it ie: VJ2-22- 1.0.... this will tell you which plug and circuit. you can use this info to help locate the wires and the fuse socket, I have the wiring diagram for your CH.. I can try to help.. If I remember right, you will need to tell the EECU that the fan over ride is turned on (installed)... -or- you can connect your own switch to the air switch on the left side of the radiator frame.. the fan uses air pressure to lock in, when power is removed. You may be able to just put an on/off switch on the 'hot' side of the air switch.. Lets see some of the other opinions on this, Jojo Quote Link to comment https://www.bigmacktrucks.com/topic/72678-help-installing-fan-over-ride-switch-on-ch613/#findComment-528367 Share on other sites More sharing options...
mechohaulic Posted April 2, 2023 Share Posted April 2, 2023 what model fan hub is used in todays world?? remember one set up would take two bolts threaded into front locking fan to hub . possibly that set up used air to engage the fan. ?? Quote Link to comment https://www.bigmacktrucks.com/topic/72678-help-installing-fan-over-ride-switch-on-ch613/#findComment-528370 Share on other sites More sharing options...
MARK2842 Posted April 2, 2023 Author Share Posted April 2, 2023 I just replaced the fan clutch. It had a horton ht550 but the updated one is the ht650. Quote Link to comment https://www.bigmacktrucks.com/topic/72678-help-installing-fan-over-ride-switch-on-ch613/#findComment-528375 Share on other sites More sharing options...
Joey Mack Posted April 2, 2023 Share Posted April 2, 2023 Mech,, his style fan is out dated.. todays world is its own world.. hell I dont even know what it used anymore.. and I'm a young'n.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72678-help-installing-fan-over-ride-switch-on-ch613/#findComment-528377 Share on other sites More sharing options...
Joey Mack Posted April 4, 2023 Share Posted April 4, 2023 I'm lost on most Mack's, or should I say Volvos, after around 2009.. but his set up is what used to work on quite a bit.. I'm getting rusty though.. Quote Link to comment https://www.bigmacktrucks.com/topic/72678-help-installing-fan-over-ride-switch-on-ch613/#findComment-528493 Share on other sites More sharing options...
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