3406C Oil light Water High Light
After the eng has been running about 20mins.The Low Oil light comes on and when the Water high light comes on. The oil presure gage reads 60+ and the water temp gage reads less then 85. The anti-freeze water and oil are all topped off,Also I have put my hand on the top of the Rad tank and it’s not hot. The motor sounds good no noise anyone have this happend to them? The truck is a 1993 T600 with a 3406C 425hp

 

The C's, if I remember correctly, had problems with the oil pressure transducers. I remember (i think) having the same problems with them and having to replace the oil pressure transducer (sensor). Hope this helps.

 

Thanks, That's what I was thinking. My truck is still parked and I'm looking to put her on the road this spring. Last nigth I run her about a hour and no light or buzz, but then I shut off the heater fan Light and buzzer went on Hmmmm I'm going to replace the oil pressure transducer and check all the wireing. Thanks again for your in put.