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After i changed the battery the speedo now reads error. no mileage. it still shows the mph though

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The place who change your battery should have reset the computer for u take it back an they will reset it.if you change it yourself call the deaerlship they will tell you how to do it.

Posted on Jul 31, 2010


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1996 dodge ram 1500 5.2 ltr. Speedometer reads 20 mph when im really traveling 75 mph. Gears shift fine but wont read over 20 mph

Dash problem. You can change the speedo motor. Done to many. From then till today. Old ones are screw in, new ones are soldered.

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I need to know if my 2005 Suzuki Forenza has a BCM or BCU? And if so where is it located? Because I know that some 2005 model vehicles have it and my odometer has stopped working. I had a 2002 Saturn SC2...

you are guessing. there is no need to.
state country and car, ok 05 Forenza.but what country.?
do not confuse Saturn with any Suzuki they are not bothers.
not at ALL.
what counts is the country and VIN.

State side, the car has OBD2 ECU/PCM. and here, we connect a
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2: is only the odometer dead?
and most cars changing out he speedo head, will fail.
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on newer cars, you must train the PCM/ BCM to accept a new speedo head. (federal rules....)

btw, its all here, read the online FSM ,for how to test and repair the ODOMETER.

on some cars 2004 and newer , use the CAN buss.
this is a communications buss all newer cars use, usa.
at some point, the ECU tells the BCM the mileage and
the BCM send this data to the speedo processor.
that is a complex path, and trying to guess, $3000 of electronics
is not a good idea. eg. swapping all 3? 1 by 1?
The book shows how to find out , where this path is broken.
on old cars, the cable is broken (gears) or head is bad.
on new cars, it's vastly more complex, foiling dealer tampers...etc.
btw2 there are cheap tools to find these facts.

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anyone that can afford to code read for free needs there head looking at my equipment has cost me thousands of pounds and returned me a lot more !!!!!! does the rev counter do funny things as well ? ...

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