snowy88 Posted October 13, 2011 Share Posted October 13, 2011 I have a 02 2litre Mondeo TDCI automatic estate. Sometimes when the engine is started, after about 3or4 seconds the milage and trip meter go off and 2 lines appear when this happens the speedmeter does not work. If I turn the engine off and on again the problem clears,not allways at the first attempt.I have tried other instrument clusters and the same thing happens, I assume the fault is not with the cluster.Can any one advise where the problem could be. Quote Link to comment Share on other sites More sharing options...
dezwez Posted October 14, 2011 Share Posted October 14, 2011 I have a 02 2litre Mondeo TDCI automatic estate. Sometimes when the engine is started, after about 3or4 seconds the milage and trip meter go off and 2 lines appear when this happens the speedmeter does not work. If I turn the engine off and on again the problem clears,not allways at the first attempt.I have tried other instrument clusters and the same thing happens, I assume the fault is not with the cluster.Can any one advise where the problem could be. could be your speed sensor maybe Quote Link to comment Share on other sites More sharing options...
snowy88 Posted November 21, 2011 Author Share Posted November 21, 2011 I have now found the cause of the faulty speedometer, The problem was two faulty cells in the battery, not bad enough to stop the car starting,but it lowered the voltage and caused the speedo to shut down.A new battery solved the problem. A company in Hull called MASTERTECH were very helpfull in solving the problem. 1 Quote Link to comment Share on other sites More sharing options...
dezwez Posted November 21, 2011 Share Posted November 21, 2011 I have now found the cause of the faulty speedometer, The problem was two faulty cells in the battery, not bad enough to stop the car starting,but it lowered the voltage and caused the speedo to shut down.A new battery solved the problem. A company in Hull called MASTERTECH were very helpfull in solving the problem. great i will keep that in mind :) Quote Link to comment Share on other sites More sharing options...
mikeamapola Posted November 21, 2011 Share Posted November 21, 2011 How can that be ? Enough power to start the car but not enough to power the speedo ?? !! What about the power output from the alternator ? Confused as I have the same problem. Perhaps I better do a voltage check on the battery first.............. thanks, Mike Quote Link to comment Share on other sites More sharing options...
mikeamapola Posted November 21, 2011 Share Posted November 21, 2011 Forgot to mention that at the same time the seatbelt warning fails to work (goodie !) Quote Link to comment Share on other sites More sharing options...
DaveCasey Posted January 26, 2016 Share Posted January 26, 2016 On 21/11/2011 at 10:37 AM, snowy88 said: I have now found the cause of the faulty speedometer, The problem was two faulty cells in the battery, not bad enough to stop the car starting,but it lowered the voltage and caused the speedo to shut down.A new battery solved the problem. A company in Hull called MASTERTECH were very helpfull in solving the problem. Thanks for posting this - I have just had the same issue on my Mondeo. Speedometer not working. Took into ATS, Kwik Fit, Evans Halshaw (Ford), and a independent garage. All said I needed a new dashboard cluster fitted at a cost of near £800. I mentioned this comment but got told it wasn't the battery. battery was tested and came back without issue. I also got another battery connected to mine via jump leads and that di not work either. I went to Halfords and got a new battery fitted (without telling them of the issue). Speedo is now working. Many thanks again for posting. Quote Link to comment Share on other sites More sharing options...
Gary_B Posted September 21, 2021 Share Posted September 21, 2021 Hi I realize it´s 10 years ago (almost to the day!) since this thread was started but I now have the same problem i.e. speedo comes on for a few seconds but is quickly replaced by 4 dashes. I tried a new battery but the problem remained. I´d read that having 2 batteries in parallel was worth a try so I did that and - it worked. I even test drove it (on my drive way, about 15m) and the speedo needle moved and all seemed good. Went back to 1 battery and problem returned. A friend of a mechanic suggested it could be the earth strap. I connected the negative of the battery to the car body via a jump lead ( a sort of temp earth strap) but no joy - so no real point taking the earth strap off and cleaning it. Now I´m completely at a loss as to what might be the problem. Any ideas anyone????? Cheers Gary-B Quote Link to comment Share on other sites More sharing options...
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