Question about 2001 Cadillac Sts
OK....Based on the age of the car, there are a couple of places I would start. Safety first....understand that when working with electricity, you can cause a lot of damage if you are not savvy to the hazards of working on automotive electrical systems. Namely, knocking out the on board computer, or frying the wiring. Common sense goes a long way. First, understand that you can "weld" with a 12 car volt car battery..!! So, with that out of the way, here's the first thing I would do: If the car is running for the day, but needs a jump in the morning, its very likely you have an accessory that is staying on and draining the power over night. It being a Cadillac, you no doubt have a lot of electrical gadgets and luxury features. One big item that comes to mind is the auto leveling feature available on many high-end GM cars. Depending on how your Caddy is equipped, you very well may have this feature. What happens, is the air pump and gear that raises and lowers the vehicle, depending on load, comes on automatically (not through the key) in other words, it can come on in the middle of the night, with the car turned off. If, for example it has a tiny leak somewhere, it will leak down, prompting the leveling device to kick on, thus draining your battery. This might also bring to mind other features on the car that might come on or stay on when the car is sitting/not running. I came across a Lexus, who's "heated rear-view mirrors" were staying on. In any case, if you discover the culprit, have it repaired, or disconnect it for the time being. Just make sure your not disconnecting something that would compromise safety of the vehicle. Next, double-check that any aftermarket accessories are not staying on....Stereo's, Amplifiers for stereo's etc. If you power a device through a "hot-wire" on the car that is "hot" all the time, and doesn't go off when the key is turned off....guess what...? It'll be on all night...!! If you are not sure how to wire accessories properly, do yourself a favor....don't burn your car to the ground, ask for help...!! It's cool, most people don't have a clue how to wire this stuff up, so don't feel bad. Finally.....check all the battery connections and terminals. If you have corrosion anywhere (not just at the battery post) it is suspect. The heavy cables that carry power to the starter....Ck both ends. You might find a connection that is tight, but eat up with corrosion. Someone might have cleaned a battery terminal, but upon peeling back the plastic cover or sheathing, discover it is full of corrosion. Besides corrosion, the number #1 problem with electrical systems on a car are A BAD GROUND.......I CANT EMPHASIZE THIS ENOUGH...!!! If you dont have a proper ground, you have no current...period!! Follow the negative battery cable to where it is grounded on the frame. You will have other smaller cables also running off of the larger one that also ground to the frame or somewhere on the apron. (the sheet metal on the inside of the fenders that protect the engine compartment from the elements) These alone do not constitute a good ground. Follow the main cable all the way to the end. Put a socket or wrench on the fastener to ensure it is tight. Sometimes they rust out. Ck it out.....let me know....
Posted on Dec 31, 2010
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Posted on Jan 02, 2017
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