I started my 77 308 the other morning just to wake it up from its winter nap. As usual, the red light came on and the needle was indicating no oil pressure with the key in the "on" position. Once the engine was running a two or three seconds the red light went out and the needle moved into the normal spot it does on a cold start (just below 85). After a few minutes I was getting ready to move the car and when I got back into the car I noticed the red light was on. The needle still indicated the same oil pressure. I turned the engine off and then re-started it. The light went out again and the needle once again swung over to the same reading as before. Again, a few minutes later the red light came on again. Its been a long time since I changed the oil pressure sender so I have forgotten if this is what drives the gauge or if it drives the light. Can someone help?