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11-02-2008, 12:00 AM | #1 |
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Join Date: Jan 2004
Location: Northwestern Ontario Canada
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Dash problem on 1990 K1500
I just purchased a 1990 Chevy K1500 4x4. The problem is the oil gauge buries itself all the way to the right and the volt gauge goes to the right all the way.
I tested the battery and it was putting 12.7 to 13 volts depending on load. Alternator was putting out 14 volts when I tested it. The volt gauge also flicks back and forth when you use the signal. Could this be faulty gauges or a bad ground? Thanks for the help.
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1986 Silverado Short box fleet side. project 2005 VW Tiguan 4 Motion 1997 Blazer S10 4x4 1990 Chevy Silverado K1500 Extended long box |
11-02-2008, 09:48 AM | #2 |
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Location: Minnesota
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Re: Dash problem on 1990 K1500
It does sound like a ground problem, but also consider the possibility of two problems.
It is very common for the oil sending units to fail on these trucks and if you unplug the oil sending unit the gauge will go all the way to the high pressure end. These dash panels do have issues with losing connection where the connector plugs on the back. I have looked up the ground path for these trucks in the past but nobody has ever pursued and repaired the turn signal making the volt gauge swing and gotten back to me about it. If I remember correctly the instrument panel ground wire connects to the chassis right next to the ALDL connector. |
11-02-2008, 01:43 PM | #3 |
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Re: Dash problem on 1990 K1500
Thank you. I have changed the circuit boards on he rear lights and the problem still exists. I will have to look under the hood and see if the oil gauge has been disconnected. Could I run a separate ground from the taillight to the chassis at the back to improve grounding. Front park lights are bright and seems to working, they do not dim or anything when the signal is put on.
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1986 Silverado Short box fleet side. project 2005 VW Tiguan 4 Motion 1997 Blazer S10 4x4 1990 Chevy Silverado K1500 Extended long box |
11-02-2008, 02:35 PM | #4 | |
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Location: Minnesota
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Re: Dash problem on 1990 K1500
Quote:
Your truck is not the only one with this problem. I have never actually got to trace down the problem on one of the trucks doing this, but it is my opinion that the problem is in the instrument panel itself, the connector to the instrument panel, or the ground wire to it. This is just my educated guess. I have read several posts on the message boards about this and nobody has posted a repair for it. |
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11-02-2008, 03:48 PM | #5 |
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Join Date: Sep 2005
Location: Linden, NC
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Re: Dash problem on 1990 K1500
On my '88 C1500 the volt gauge moves down just a little with the turn signal flash. I've always just considered this "normal". It's occurred on several different vehicles I've owned.
Last edited by JohnO356; 11-02-2008 at 03:50 PM. |
11-02-2008, 05:57 PM | #6 | ||
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Join Date: May 2004
Location: Minnesota
Posts: 4,621
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Re: Dash problem on 1990 K1500
Quote:
Some volt meter movement with the turn signals flashing, I would consider normal and would not worry about. Quote:
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