1994 Pontiac Grand Am problem with wiring I think

Well, the first place I would start is to completely unhook the radio and ensure now wires are touching that are unhooked. I am guessing you cut the wires or they were already cut? Otherwise, a radio wiring harness is a much better way to go then cutting the stock radio wire harness.

Now that the radio is out of the way and all wires are completely insulated and not touching, check all fuses inside and under hood as well.

It sounds like when you pushed the radio into the dash, some of the wires that may have been a little bare have touched and blown a fuse or shorted out.

Not all vehicles have fuses under the hood. If it does have fuses under hood then it should be in pretty plain view. Usually a black box located in one of the corners of the engine compartment. Most common place is next to the battery. Again, not all vehicles have this though. So don't look too hard, if it isn't there it isn't there ;) Just let me know what you find out in the morning and I will follow up.

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Glad you got it workign again. It is unusually warm here in Kentucky hehe.

You can reset the computer by disconnecting the ground cable from the battery for 15 - 20 minutes. Please note that this will reset the entire computer system. So your radio and other settings will lose their memory as well, so you will have to set them to your preference again.

Hello again.

Well, I would first go to an auto part store and get the code(s) from the engine light whenever it is illuminated. Could be a sensor, could be oil pump, could be several other things. Engine code will point us in the right direction quickly.

It could just be the weight of oil you used as well though. As the oil warms it is "thinner", meaning that it flows more easily and is closer to the consistency of water. The bearings on your engine use a film of pressurized oil to maintain a gap between the crankshaft or camshaft and the block or rod. That gap is initially quite small and thinner oil is used. As the engine wears it becomes necessary to use a thicker grade of oil. With your vehicle having 150,000 miles on it, you may need to adjust the vescosity of the oil you are using. Same brand, just different weight/vescosity i.E. 10w50 instead of 5w30.

Post those codes and I will follow up. In the meantime, as long as there are no unusual noises coming from the engine then it is being lubricated well so no worries there.

Hope this helps.
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You need to have your oil pressure tested with an oil pressure gauge to get the true pressure. It may just be a bad oil pressure sender. This will cause your gauge to fluctuate as if the oil pressure is changing, but the oil pressure is actually just fine. Post results of the pressure test and I will follow up.

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Has all the signs of a sticking thermostat. If it gets stuck closed, this prevents coolant from passing through the lines. No coolant through the system means no heat for you and too much heat for the engine ;)

You can always remove thermostat and place it in hot water over stove. Use a meter capable of hot temps. To see what temperature it opens at. If it opens past around the 190F mark (or not at all) it needs to be replaced.

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