Swisstonihasher Posted May 4, 2015 Share Posted May 4, 2015 Hi all. Already done some leg work on this and know p0691 relates to fan and its leak to earth. Just checking my math on this really...when disconnected module plug. Doing ohms test on that plug i get a reading between the positive and negative connectors. That means it open circuit and will be causing a drain correct? Need replace module? Quote Link to comment Share on other sites More sharing options...
jeebowhite Posted May 8, 2015 Share Posted May 8, 2015 that sounds correct to me! I would say a new module is a good starting point, but get a used one from a breaker or something to keep the cost down and the OEM product. Quote Link to comment Share on other sites More sharing options...
supercmaxer Posted May 10, 2015 Share Posted May 10, 2015 There has been a recall for the fan wiring on the c max, the build up of road salt causes fire but if this is the problem be careful as some other people have had this fixed but came out of fords with other problems which fords aren't prepared to look at. Quote Link to comment Share on other sites More sharing options...
Swisstonihasher Posted May 10, 2015 Author Share Posted May 10, 2015 Funny enough i had the fix but not sure if had p0691 code before then, dont remember seeing it before. It.kinda means the fix isnt a fix.as its my actual.module thats leaking live to earth and the could cause the wires to over heat if im not mistaken? My dealer wont touch it without me payin 100s so trying 2nd hand module. Quote Link to comment Share on other sites More sharing options...
Swisstonihasher Posted May 13, 2015 Author Share Posted May 13, 2015 Okay really peev with car now. 2nd hand fan and module...fitted. reset pcm and went for run only for fault to reappear. P0691. Relay has been changed with matching horn relay so what the hell else can it be? Odd thing is fan works, switch air con on and shes blowing like she should. Confused.com Quote Link to comment Share on other sites More sharing options...
jeebowhite Posted May 13, 2015 Share Posted May 13, 2015 sounds to me like its probably bad wiring 1 Quote Link to comment Share on other sites More sharing options...
Swisstonihasher Posted May 14, 2015 Author Share Posted May 14, 2015 I was reading another discussion on this, kept on about the purple wire having corrosion. Any ideas where the loom sits in water, where exactly that point is? So say this causes the issue. Quote Link to comment Share on other sites More sharing options...
jeebowhite Posted May 14, 2015 Share Posted May 14, 2015 Not sure where tour referring to. Quote Link to comment Share on other sites More sharing options...
Swisstonihasher Posted May 15, 2015 Author Share Posted May 15, 2015 Reading another topic with same fault but from a ford mechanic (paid for advice), said there's a location where the cabling comes out of the PCM (I now know its in the wing, pass side), between that and the connector for the fan module, the loom can sit in water puddles after its been washed or it rains and this causes corrosion? I'm going to remove the headlight and check what I can tomorrow morning, trace this purple cable back. I still wonder if my P0380 error which also relates to circuit issue but glow plug system could be the same set of cabling causing the issue? Quote Link to comment Share on other sites More sharing options...
iantt Posted May 15, 2015 Share Posted May 15, 2015 Think the purple wire your refering to is blue on yours.the wire may be corroded but not broken as you say fan still works. Quote Link to comment Share on other sites More sharing options...
Swisstonihasher Posted May 15, 2015 Author Share Posted May 15, 2015 Yup that's the one, although I'm sure it looks purple. I'll look at it sat am...I'm hoping I can just put another cable along side it. Quote Link to comment Share on other sites More sharing options...
Swisstonihasher Posted May 18, 2015 Author Share Posted May 18, 2015 Okay plot thickens, decided to remove the recall cabling connectors so fan back as original wiring and wow! The P0691 error has gone and hasn't come back. Yet to see if my starting issue comes back but doesn't seem to be any extra drain on the battery having the wiring back as it was. I checked all of the loom I could, the cabling is in really good condition and no sign of corrosion. Quote Link to comment Share on other sites More sharing options...
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