2007 peterbilt fan will not shut off
12-17-2021, (Subject: 2007 peterbilt fan will not shut off ) 
Post: #1
2007 peterbilt fan will not shut off
working on a 2007 peterbilt with a isx 871. the fan is on all the time. at the OEM ecm connector its only putting 9 volts to the fan solenoid. all the A/C stuff tests out good. no breaks in the wires. Could it be a bad ECM ?
replyreply
12-17-2021, (Subject: 2007 peterbilt fan will not shut off ) 
Post: #2
RE: 2007 peterbilt fan will not shut off
does the ecm say the fan state is on in the Insite software?

9 volts sounds a bit odd too though.

Also, have you checked to ensure there is full air pressure in the fan-hub air supply line?


User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!.
replyreply
12-17-2021, (Subject: 2007 peterbilt fan will not shut off ) 
Post: #3
RE: 2007 peterbilt fan will not shut off
Hook up insite and see what is controlling the fan. Will it shut off if you manually put air to it?

Could be the valve or a plugged line somewhere going to the fan.

It's not gonna be a bad ecm. Is this thing stock or demandated ?


User's Signature: Warranty??? Yeah right, I am the warranty!!!
replyreply
 Thanks given by: Rawze
12-17-2021, (Subject: 2007 peterbilt fan will not shut off ) 
Post: #4
RE: 2007 peterbilt fan will not shut off
i have full air pressure going to the solenoid but only a little pressure going out due to the low voltage from the ecm. i can put 12 volts to the solenoid with a power prob and the fan spins freely take it off and plug it back in and the fan locks up. insite says that the fan demand is 0. everything looks good on insite it is set to on/off fan type and 0v to turn on. it is stock.
replyreply
12-17-2021, (Subject: 2007 peterbilt fan will not shut off ) 
Post: #5
RE: 2007 peterbilt fan will not shut off
Maybe a bad ground?


User's Signature: Warranty??? Yeah right, I am the warranty!!!
replyreply
12-17-2021, (Subject: 2007 peterbilt fan will not shut off ) 
Post: #6
RE: 2007 peterbilt fan will not shut off
ground is good at the battery's and the ecm.
replyreply
12-17-2021, (Subject: 2007 peterbilt fan will not shut off ) 
Post: #7
RE: 2007 peterbilt fan will not shut off
Read insite for ecm voltage... If its showing over 12 and only 9 going to fan Id swop ecm to test and see what happens.. Maybe bad circuit in ecm
replyreply
 Thanks given by: Rawze




NOTE: Rawze.com is not affiliated, nor endorses any of the google ads that are displayed on this website.
  
  
Theme by MyBB Addict
Contact Us | Rawze.com | Return to Top | Return to Content | Lite (Archive) Mode | RSS Syndication