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Car Forum / Driving, Maintenance, Tuning / Maintenance and Repair / November 2005Speedometer doesn't work on 1994 Buick Century.
I have a speedometer that doesn't work on a 1994 Buick Century. I took the car off the road for the summer and just put it on the road for a winter beater. I replaced the speed sensor and also the speedometer assembly unit. It worked OK for about 2 weeks. Now it doesn't work again. When I start it, the speedometer does go up to the 5 MPH mark as it usually does when you turn on the key, but it doesn't move. Any ideas what it could be? Could it be a short or something? I'm flat out of ideas. Get it on a scanner, if the scanner p[cks up mph, then the speedo head is bad or the connections from the pcm to the head are bad, sometimes but rarely the pcm could be at fault, if no speed is reading on the scanner speed sensor or wiring is suspect. >I have a speedometer that doesn't work on a 1994 Buick Century. I took > the car off the road for the summer and just put it on the road for a [quoted text clipped - 7 lines] > Any ideas what it could be? Could it be a short or something? I'm flat > out of ideas. Is there anyway to disconnect the transmission from beiong sensitive to the speedometer so that the transmission shifts normally without it being stuck in second before the "Check Engine" light comes on? > Get it on a scanner, if the scanner p[cks up mph, then the speedo head is > bad or the connections from the pcm to the head are bad, sometimes but [quoted text clipped - 15 lines] > http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups > ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- >Is there anyway to disconnect the transmission from beiong sensitive to >the speedometer so that the transmission shifts normally without it [quoted text clipped - 15 lines] >> > Any ideas what it could be? Could it be a short or something? I'm flat >> > out of ideas. Any possibility the new speed sensor failed? A lot of aftermarket parts aren't much good. What brand was it? > Any possibility the new speed sensor failed? A lot of aftermarket > parts aren't much good. What brand was it? I've had garages put test it by putting in other speed sensors. Didn't help. Another unusual thing is if I let the car rest without starting it for a few days, the speedometer will work OK for a short while. Yesterday, I had a problem where the car would not shift at all and the check engine light would not come on. The speedometer wouldn't work as usual. The only times when the car wouldn't shift is when it was warm after I shut it off. If I wait until it cools off, it will shift properly once the check engine light comes on. Is this an indication of a short? > > Any possibility the new speed sensor failed? A lot of aftermarket > > parts aren't much good. What brand was it? [quoted text clipped - 4 lines] > Another unusual thing is if I let the car rest without starting it for > a few days, the speedometer will work OK for a short while. |
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