2003-04 Mach 1 Registry Owners Club

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-   -   Speedometer not working (http://www.mach1registry.org/forums/showthread.php?t=135884)

03INCT 04-16-2017 03:45 PM
Speedometer not working
 
Took the car out today for the first time sincew I took the battery out for storage. Ran pretty good but noticed the speedometer was not woking and to odometer went to -----------. Any sugggestions???

311-420 04-16-2017 04:38 PM
Re: Speedometer not working
 
Are the reverse lights working? If not, I bet that plug for the harness on top of the transmission has come unplugged or gotten damaged. Just fixed this issue myself a couple months back.

Be careful, when the speedometer doesn't work the car has no idea how fast it's travelling and can stall out very easily. Especially when coming up to a stop.

03INCT 04-16-2017 05:31 PM
Re: Speedometer not working
 
Quote:
Originally Posted by 311-420 (Post 1625551)
Are the reverse lights working? If not, I bet that plug for the harness on top of the transmission has come unplugged or gotten damaged. Just fixed this issue myself a couple months back.

Be careful, when the speedometer doesn't work the car has no idea how fast it's travelling and can stall out very easily. Especially when coming up to a stop.
It did stall out, that's when I noticed it. is it a large harness?? Mice??

311-420 04-16-2017 10:07 PM
Re: Speedometer not working
 
Quote:
Originally Posted by 03INCT (Post 1625553)
It did stall out, that's when I noticed it. is it a large harness?? Mice??
That plug/harness has the speedo, reverse lights, some oxygen sensors etc all in that one plug. Check to see if your reverse lights are working or if there's some oxygen sensor codes being thrown.


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