Low coolant light

2002 SATURN SC2
155,000 MILES • 1.9L • 4 CYL • FWD • MANUAL
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ROYBLIZ
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The low coolant light is on and I have done the following:
1) new tank
2) new CTS
3) unplugged tank checked still on
4) put jumper wire on plug still on

I am stumped, figure it is a wire issue or ECM or PCM, please help
Dec 19, 2015 at 10:05 PM
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RIVERMIKERAT
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Use a volt-ohm meter to check continuity between the sensor and ECM, then check to ensure the sensor has voltage.
Dec 20, 2015 at 12:34 AM
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ROYBLIZ
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Do you know what wire(or is it the same color) it is at the ECM? also is the ECM above the transmisson?
Dec 20, 2015 at 2:27 AM
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SATURNTECH9
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Just to add to this one if you jumped the connector to the bottle and it's still on?I would see if the back up fuse is blown in the underhood fuse box?The first one I saw like that I was puzzled also but found out there was a blown back up fuse.
Dec 22, 2015 at 7:23 AM
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ROYBLIZ
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SaturnTech9; I checked the fuse and sure enough it was blown. I haven't had the chance to replace it and test, but I am SO THANKFUL for your insight into this.
Dec 23, 2015 at 9:44 AM
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SATURNTECH9
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Yeah I worked for Saturn as a tech for over 16yrs so I have a lot of insight on things on these cars most people wouldn't have.I Still have a Saturn I have a 1999 Saturn sl2 I love the S model Saturn's.Let me know what you find you probably have a bad back up light bulb.That blew the fuse.
Dec 23, 2015 at 11:45 AM
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ROYBLIZ
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The fuse was blown, put in another one it blew, messed with the wires, not sure what I did but now the fuse is fine, jumpered the connector to backup light switch and turns out the switch is bad. I ordered it and we will see how it works after I get that put in.
Dec 24, 2015 at 6:04 AM
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SATURNTECH9
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Yeah it's common for those manual transmission back up switches to go bad.I have never seen one go bad and blow the fuse.
Dec 24, 2015 at 11:55 AM
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ROYBLIZ
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Ok, the end result was the backup light switch was bad. I ordered one, once I put it in, the backup lights work, and the low coolant light is no longer on. You ROCK! Thanks so much.
Jan 6, 2016 at 11:48 AM
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SATURNTECH9
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Your welcome thanks for update glad I could help.
Jan 6, 2016 at 12:25 PM
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