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Speedometer intermittent

Tiny
ESTHER SAWYER
  • MEMBER
  • 1993 BUICK ROADMASTER
  • 7.5L
  • V8
  • RWD
  • AUTOMATIC
  • 550,000 MILES
My speedometer works sporadically. It does not seem to be associated with a certain speed. Sometimes if it is not working and I hit a bump, it will start up. Is it possible there is a loose cable or is there one? Thanks.
Tuesday, June 20th, 2017 AT 10:20 AM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
These are electrically controlled so you may have a loose ground to dash. There is also a module that runs speedometer so have it scanned for codes and check ground behind left kick panel for loose.
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Tuesday, June 20th, 2017 AT 12:15 PM
Tiny
ESTHER SAWYER
  • MEMBER
  • 2 POSTS
Thank you!
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Friday, June 23rd, 2017 AT 1:03 AM

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