Leo199107 Posted March 21, 2019 Share Posted March 21, 2019 Hello guys I had a bad fan clutch , and I replaced today ,but I went and tried to be a pro and installed an override fan switch . I hook up the hot (power wire) just before the fan solenoid valve and a ground from the frame . I by an accident let the ground and the hot wire touch each other ,and my fan is stuck running now I can’t get it to stop . I checked that hot wire for power with a test light and it doesn’t have power at it . I followed my checking with my light test tool , and I have power everywhere ( ac high and low pressure switches ) all have power except The coolant temperature sensor that attached to the over flow tank and the Engine fan solenoid valve don’t have power in the wires . WHERE IS THE RELAY fan solenoid valve wires ? If there is any ? Btw (I checked that 15 amps fuse for the fan clutch and it’s not blown ) so idk where would I find that relay for the solenoid valve , so I can get the fan to stop from running everytime the truck is on . Btw I have an AI460 2006 chn613 Mack (the green engine ) Quote Link to comment Share on other sites More sharing options...
Mackpro Posted March 21, 2019 Share Posted March 21, 2019 What kind of fan clutch ? Air or electric? Quote Link to comment Share on other sites More sharing options...
Mackpro Posted March 21, 2019 Share Posted March 21, 2019 If air fan clutch. You should have 12 volts going to the fan clutch solenoid straight from the fuse box. The other wire ( ground) goes to the engine ecm. The engine ecm makes the ground internally to disengage the fan clutch. When the engine ecm sees hight coolant temp , high AC head pressure or high intake temp it opens the circuit ( takes away the ground ) and the fan clutch engages. 1 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.