Full scale deflection on gauges

3 messages, Last post on Feb 13, 2009 at 7:05 PM

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#1 of 3 Full scale deflection on gauges by eyesie Jan 11, 2009 (10:42 am)
I have a 2002 Expedition with 95,00 miles on it. Recently, or at least I only noticed it recently, when Istart the car, all the gauges go to full scale deflection, and then return to normal. Everything appears to be working fine. Is this normal, and I have just not noticed it? OBTW, it is the original battery, so it is getting ready for replacement. Replies to this message: pmorg1 (Feb 06, 2009 1:46 pm) Bowser3 (Feb 13, 2009 7:05 pm)
#2 of 3 Re: Full scale deflection on gauges [eyesie] by pmorg1 Feb 06, 2009 (1:46 pm)
Replying to: eyesie (Jan 11, 2009 10:42 am) Mine did this. The gages are all re-calibrating by going to full scale, then back to zero and then to current reading. I believe that with a weak battery, when the voltage drops below a certain level when starting, the gages go into this "calibration" mode. Of course, they will also do this when you replace the battery also. Replies to this message: Bowser3 (Feb 13, 2009 7:05 pm)
#3 of 3 Re: Full scale deflection on gauges [pmorg1] by Bowser3 Feb 13, 2009 (7:05 pm)
Replying to: pmorg1 (Feb 06, 2009 1:46 pm) I have a 01 and I have started seeing this on mine recently. I swear that it it did not do that before but now it is every time the ignition is turned on even without going to crank with the key. I don't have any idea what the problem is but about the same time it started running rough.