speedo not working sometimes

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Aug 23, 2006 | 10:44 AM

ironexcursion

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speedo not working sometimes

hey guys, my speedometer is not working at times. Also, when it is not working, the "overdrive off" light is flashingand it will not go into 4th gear. ussually turning the excursion off and cranking it back up seems to "fix" it most ofthe time. anyone else have this problem or know what the source of the problem is? Thanks again.
Nigel<><

Aug 29, 2006 | 07:37 PM

yachtdoc73

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From: Upper Michigan

I have had the same issue with my X. It also logs a code of P0500 when this happens.
I have been told that if it isnt a wiring harness issue that the sensor is either bad or it has metal filings on it and needs to be cleaned. The part is less than 20 bucks so if I am crawling under the truck to clean it I may as well replace it instead.

Sep 1, 2006 | 06:54 PM

Pickupmanx2

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Joined: Jun 2006

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From: Near Yosemite CA

Yep, check your A-S, or your rearend whichever you prefer, the speed sensor is in there and runs off the ring gear, if it is acting funny, might be time for a fluid change and to clean it off. How many miles? Always remember, changing fluids is a helluva lot cheaper than changin parts!!!

Sep 8, 2006 | 07:19 PM

heatmon

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Speedo not Working

I have experienced this exact problem also, but mine is accompanied by a massive loss of power. Alot of the warning lights on the dash stay lit also. Although I don't have a solution, and it seems to happen when it rains really heavilly, the problem seems to be electrical. Whenever this happens, my drivers door window, which usually takes a long time to go up or down, will operate very quickly.

Quote:

Originally Posted by ironexcursion

Sep 8, 2006 | 11:52 PM

RACERX7775

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From: WARRINGTON, PA

well then, there are pros and cons for electrical problems. at least your window moves fast.

Sep 9, 2006 | 01:30 AM

Jetfixr

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From: Orange County U.S.A.

Quote:

Originally Posted by heatmon

I have experienced this exact problem also, but mine is accompanied by a massive loss of power.

The VSS is used by the computer to calculate many settings of engine control and transmission shifts. A short or water in the sensor connector could send faulty info causing unexpected results. Although I wouldn't expect (massive) power loss.
Jerry

Sep 9, 2006 | 03:56 PM

heatmon

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RE: Speedo not Working

Where is the VSS located? Some posts here say a problem like this is caused by the CPS (Cam Position Sensor), located near the bottom front passenger side of the engine (Makes sense for the possibility of water intrusion). And there is definitely a MASSIVE loss of power during one of these events.

Quote:

Originally Posted by Jetfixr