Trans Am Information > Electrical

79í TA speedometer stopped working

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jvmagic:
Hi,

I have a 79í TA and the speedometer started to make a bird chirping noises  a few months back until  the speedometer stopped working.

I did the speedo cable test by disconnecting from the tranny, drill in the reverse position, and the speedometer did work.  I connected the cable and then went to the transducer.  I disconnected the smaller cable from the transducer and connected to the drill and the speedometer did not move. Iím not sure what that means so Iím hoping for some guidance. 

How can I confirm itís a cable or the transducer? 

79í Trans Am
403 motor
350 tranny
Cruise control


Thanks in advance

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