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speedometer & tach failure

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Old 01-29-04, 08:39 PM
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speedometer & tach failure
The speedometer & tachometer on my '93 RX7 ceased to function at the same time. Can someone tell me the probable cause and resolution?
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Old 01-29-04, 08:54 PM
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Check fuses
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Old 01-29-04, 09:16 PM
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don't quote me on this but I heard the ignitor controlls those functions.
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Old 01-29-04, 09:26 PM
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Tachometer is from crank angle sensor.
Speedometer is from vechicle speed sensor.

I would check the routing and connections to your gauge cluster before anything else.
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Old 01-29-04, 09:40 PM
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Well, I've had this happen once shortly after I first got mine and a fuse (maybe even two) blew. Just a suggestion from my experience.
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Old 01-29-04, 10:23 PM
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If fuses are blowing ther is a short somewhere.
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Old 01-29-04, 10:37 PM
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True...of course, it never happened again on mine. Go figure.
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Old 01-29-04, 10:42 PM
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my speedo and odo dont work, before i pull out the speed sensor, any idea which fuses i could check?
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Old 01-29-04, 10:49 PM
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They would be under the dash, but I'd go with clayne too and check for shorts too.
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