1999 CAVALIER WIRING DIAGRAM
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1996-1999 Chevrolet Cavalier Vehicle Wiring Chart and Diagram
Commando Car Alarms offers free wiring diagrams for your 1996-1999 Chevrolet Cavalier. Use this information for installing car alarm, remote car starters and keyless
1999 Chevy Cavalier 2 I have a wiring diagram for the
1999 Chevy Cavalier 2 I have a wiring diagram for the system. What I need is a logic sequence for how the PCM uses - Answered by a verified Chevy Mechanic5/5I like it. I'm not an electrical engineer, but best I can see, that's a good circuit.That pressure is too high, you don't want your AC system going to 450. and I assume you mean ON at 450 and off at 325, no?I like your numbers.All you have to do is rate my answers, and I get compensated. Thank you, ***** ***** luck with it! -JerryI can help you with this, I believe. What exact problem are you trying to solve?I think I know how to answer you, let me throw this out there and see if this is what you're looking for. PCM receives AC request from the HVAC control panel. PCM receives input from AC pressure sensor that has to be within parameters (I can probably look this spec up for you if needed), and engages the compressor as long as there is no other reason to disable AC, such as engine overspeed, engine overtemp, and probably a handful of other potential reasons. Is this the sort of thing you're asking for?OK, anything else you need? :-)The pressure sensor input needs to be between and 4. I have done retrofits into other hot rods like this, and have found ways to simply fake this signal at 2 for purposes of making the ECM happy and allowing the AC to work. You can use the original sensor, provided you can find a way to plumb it in somewhere. It would be better to use it if you can, because that will ward off problems if the AC system malfunctions somewhere down the line, but it will run without that sensor if the value is within parameters. You have the wiring schematics, you say, so do you have the schematics that show this input and the AC request input?If you aren't using a PCM, this is easy. You don't need any of the inputs, you just need to wire a relay for the compressor to your HVAC control panel. There's no need for pressure sensor at all. I would use a low pressure switch to shut it off to prevent evaporator freezing, but that's all you really need.In the Cavalier, the fan would come on in response to pressure switch input. Approx on at 250psi, off at 175 (this has been my real world experience). Since you don't have that logic built into your system, I would turn the fan on any time the AC is engaged (and this is what I've done on hotrod projects in the past with good success). If you don't want to use the PCM, you'll have to have some logic component that reads the sensor input and determines fan on/off.