Low water light came on, but...
As I was going up a long grade the low water light came on but the temp gauge showed perfectly normal. Got to the top of the grade and pulled over to check everything. No coolant is leaking anywhere t...
Forum Discussion
Well,I thought I had a simple fix for this problem. Got up this morning and added a quart of coolant to the overflow tank, started it up and the light and buzzer immediately stopped. I thought wow, easy fix.
So I headed down the road and after about 30 miles the light came back on again. I pulled into a town and bought a new radiator cap since I had seen a little seepage on the tank and also added a little more coolant(even though the site glass showed full). Unfortunately the light and buzzer stayed on this time.
I drove another 20 miles to a Cummins shop and asked them to test the sensor and/or get a new one. The sensor had continuity and voltage, so they didn't understand why the alarm was on. They thought maybe the sensor was shorted out.
They had a new sensor in stock and put it in, but that didn't solve the problem, so I had them pull the alarm out of the dash. They only charged me for a half hour labor and $26 for the switch, so I was okay with that.
The problem isn't fixed, but at least I can drive it without the alarm blaring. I just watch the temp gauge(like I have done for 40 years on vehicles) and will check coolant level each morning.
I don't want to spend thousands trying to figure this out and I am still able to be rolling down the road until I decide if I want to dig into this problem later.
So I headed down the road and after about 30 miles the light came back on again. I pulled into a town and bought a new radiator cap since I had seen a little seepage on the tank and also added a little more coolant(even though the site glass showed full). Unfortunately the light and buzzer stayed on this time.
I drove another 20 miles to a Cummins shop and asked them to test the sensor and/or get a new one. The sensor had continuity and voltage, so they didn't understand why the alarm was on. They thought maybe the sensor was shorted out.
They had a new sensor in stock and put it in, but that didn't solve the problem, so I had them pull the alarm out of the dash. They only charged me for a half hour labor and $26 for the switch, so I was okay with that.
The problem isn't fixed, but at least I can drive it without the alarm blaring. I just watch the temp gauge(like I have done for 40 years on vehicles) and will check coolant level each morning.
I don't want to spend thousands trying to figure this out and I am still able to be rolling down the road until I decide if I want to dig into this problem later.
