1991 Skylark coupe

Gputkey

New member
2
0
1
Buick Ownership
1991 Skylark GS
My tach and speedo wig out and peg sometimes. I can make this happen by by selecting the ride control selector. Plus all 3 lights on the ride control selector, soft, auto and sport are on.
 

Regal LTD Coupe

Well-known member
1,109
248
63
Buick Ownership
1993 Buick Regal Limited coupe 3800
Have had such issues clear up upon alternator replacement though no guarantees.
 

2007LucerneCXL

Full Member
7,756
2,597
113
Illinois
Buick Ownership
2007 Lucerne CXL. and 1995 Lesabre currently, past 1973 Riviera, 1968 Riviera
The gauges are getting the signal from the ECM, the sensor on the transmission may be something to look at if it or the harness is having a problem. It can be another item but not having access or additional information this is a best guess and as mentioned a possible ground issue. Also assuming that, if equipped, the cruise control may also be having a problem.

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Gputkey

New member
2
0
1
Buick Ownership
1991 Skylark GS
I checked the grounds and seem ok. One thing I noticed is that go haywire every three minutes within a couple seconds. I'm trying to think what in the ECM does that. Ride adjustment?
 
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