jon1178 Posted September 9, 2012 Report Share Posted September 9, 2012 While driving with the windows down I noticed my truck was overheating and quickly realized my fans were not coming on. So I turned on the a.c. and I could hear them come on which cooled the truck back down from about 255*f back down to 200*f . I got lucky. When I got home to check thing out I realized only one fan the pass side was coming on only when the a.c was activated. I swap the fan plug to verify both fans work and they do. I also swapped around the relay and they all seem to work but the driver side fan still is not coming on. I am running the nelson harness. I am at a loss not sure what to try next. Quote Link to comment Share on other sites More sharing options...
The_aSSet Posted September 9, 2012 Report Share Posted September 9, 2012 Sounds like the harness, check all the wires and grounds, and the pcm connections Quote Link to comment Share on other sites More sharing options...
jon1178 Posted September 9, 2012 Author Report Share Posted September 9, 2012 I am thinking the same I just took a closer look and it looks like one of the plug holes for the relay is melted a little bit. Quote Link to comment Share on other sites More sharing options...
Silverad0 SS Posted September 9, 2012 Report Share Posted September 9, 2012 Man I've been driving months without my efans working, I kept wondering why my a/c wouldn't work when the truck wasn't moving and it's been like that for months!!! And finally I got stuck in traffic then it started over heating, your truck shouldn't over heat while moving, it ended being a relay for me good luck hope you fix it Quote Link to comment Share on other sites More sharing options...
The_aSSet Posted September 9, 2012 Report Share Posted September 9, 2012 Man I've been driving months without my efans working, I kept wondering why my a/c wouldn't work when the truck wasn't moving and it's been like that for months!!! And finally I got stuck in traffic then it started over heating, your truck shouldn't over heat while moving, it ended being a relay for me good luck hope you fix it what harness are you using? Quote Link to comment Share on other sites More sharing options...
JC03SS Posted September 10, 2012 Report Share Posted September 10, 2012 Nelson harness I think.. Quote Link to comment Share on other sites More sharing options...
jon1178 Posted September 10, 2012 Author Report Share Posted September 10, 2012 (edited) Well it turned out to be a relay. I thought I checked all three but I must checked one of them twice by accident. I went ahead and bought two relays that way I could keep a spare in the glove box. Edited September 10, 2012 by jon1178 (see edit history) Quote Link to comment Share on other sites More sharing options...
The_aSSet Posted September 10, 2012 Report Share Posted September 10, 2012 Good thinking, glad you found the problem Quote Link to comment Share on other sites More sharing options...
lgowen343 Posted September 10, 2012 Report Share Posted September 10, 2012 I have the same problem on my truck. I have the PCM4less harness. and each year right in the middle of summer in AZ (108*) one of the relays melts. I did the same thing, bought one relay from O'reilly auto parts and another for a spare. They have a lifetime warrantee on their relays. I've used the warranty twice now. Quote Link to comment Share on other sites More sharing options...
candyman74 Posted October 26, 2012 Report Share Posted October 26, 2012 (edited) i had the same thing happen with a black bear harness as well. the relays need to be direct wired instead of the relay harness'. whats happening is the connections are not tight enough in the harness' causing a bad connection then causing the relay to heat up and melt. Edited October 26, 2012 by candyman74 (see edit history) Quote Link to comment Share on other sites More sharing options...
kissfans03ss Posted October 26, 2012 Report Share Posted October 26, 2012 I to had this issue this past summer. Sent from my DROID BIONIC using Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
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