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1993 Oldsmobile 98 speedometer

Tiny
MERCMAN4950
  • MEMBER
  • 1993 OLDSMOBILE 98
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 100,000 MILES
My speedometer has pegged out. I bought a replacement cable from auto zone. Is it really that simple to just pull the old cable out of the housing, measure and cut a new one? Or is there more to this than I'm being told? Thanks for all your help.

Chad
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Friday, June 4th, 2010 AT 3:56 PM

8 Replies

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Speedo should use vehicle speed sensor (VSS), no speedo cable
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Friday, June 4th, 2010 AT 10:42 PM
Tiny
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Ok thank you. Bought one and replaced with no luck. I removed the dash cover and speedometer cover and can move the needle but when I move the car in either direction the needle jumps. How do I get the gear selector lever unhooked so I can remove the speedometer? Is there any thing else it could be? I'm at wits end.

Chad
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Saturday, June 5th, 2010 AT 2:18 PM
Tiny
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Just to be clear, is your instrument cluster a digital or the standard analog type?
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Sunday, June 6th, 2010 AT 8:40 PM
Tiny
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It's an analog. Everything else works. The gas hand, temp gauge, all lights. But no speedo. Does it have a motor on the back side of it? If so and that's the culprit where can I find one?
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Tuesday, June 8th, 2010 AT 5:46 PM
Tiny
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No there's no motor, just the vehicle speed sensor for the speedo. Does the tachometer work?
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Tuesday, June 8th, 2010 AT 10:13 PM
Tiny
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  • 5 POSTS
Doesn't have a tach. I think its either the instrument cluster or the pcm. I can't find any other items between the vss and the speedo. Just not to sure how to test.

Thanks,

Chad
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Thursday, June 10th, 2010 AT 8:39 PM
Tiny
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No real way to test PCM other than swap it with known good one. How about the odometer, is it working? If it is then the PCM is good because the odo and speedo get the signal through same wiring to PCM.
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Thursday, June 10th, 2010 AT 9:04 PM
Tiny
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Yes odometer and trip are working fine. Sounds like a bad cluster then. Thanks for all your help. You guys are great.
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Friday, June 11th, 2010 AT 8:29 PM

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