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IF you really can't find a problem with the sensor chain, there is one other thing I've seen. I wouldn't have thought it would pertain to this chassis, but then again I didn't think a 140 ever used the sensor chain logic either.
I did see a 202 chassis that we absolutely couldn't figure out why the low coolant lamp kept coming on. Turns out there is some sort of relationship between either the cluster and the engine control module or the cluster and the ACC which will throw on the low coolant lamp in the event of an aux fan failure. Any chance the aux fans are inop on this thing?
Gilly
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