It slowly switches off and on and it's "duty cycle" "chops" the current to the oil, temp, and fuel gauges as a crude form of voltage regulation. The gauges are "thermal" and operate/change position slowly so you don't notice the gauge current switching on and off.
So if it gets "flaky" it should affect all the gauges, but I suppose it could affect the temperature gauge a little differently. ANYHOW, they DO fail from time to time, might not hurt to change it.
If it's not the IVR it IS possible that gauge is failing, also check that the IVR is well grounded, and there's no poor connection(s), intermittent shorts or damage in the gauge circuit board that could be affecting it.
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Today's Featured Article - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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