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Idiot Light and Coolent Warning

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Old 01-17-04, 02:37 PM
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Question Idiot Light and Coolent Warning

alright guys here it goes.....
I know when the idiot lights stay lit up full when the car is on that it is a signal about alternator problems. What mine does however is turns off when the car turns on, but the lights light up when the car is off. I have a new FD alt. so I dont want to think its the alternator that is causing problems. also, apon quick inspection all the wiring looks to be fine. Ideas? Tests to do?

second and maybe related topic.
My add coolent warning (freaking buzzer!!) keeps going off (has been intermittent ). I have bled the system already as I know that can cause the problems. I also have a brand new coolent level sensor. It was going off then stopped for a couple days and now today it has started up again. Maybe bad wiring? coolent is full (tank and rad). I also replaced the thermostat (yes correctly) in recent history. Checked the rad cap and the seals look fine. I have a freshly rebuilt CPU that I replaced if that makes any difference.

I also had a current drain problem which killed (completely) my battery, I have a new battery now and havn't had a chance to do a current drain test (my multi-meter doesn't have an amp tester that works), and just to be sure I'm doing it right you disconnect the postive battery cable and put the multi-meter in between? I know the ambient draw from some of Icemarks past post

I have thoroughly searched on all my topics and havn't gleaned any usefull information from past threads so please don't tell me to search.

Thanks to anyone who can help me out with my little electrical gremmlins.
Old 01-17-04, 03:02 PM
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sure that the new FD alt was installed correctly? it's common to mix up the feed and run wires and have that happen
Old 01-17-04, 03:04 PM
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So you would suggest checking those two control wires?
Old 01-17-04, 03:13 PM
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yeah, if you swap them does the problem go away?
Old 01-17-04, 03:25 PM
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I'll be right back with the answer
Old 01-17-04, 03:28 PM
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Mark you are a god. Do you think this would cause the coolent buzzer problem also?
Old 01-17-04, 03:34 PM
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The coolant buzzer comes from the back of the gauges...

Then there is also the buzzer in the CPU.

If the alt is not working correctly it is not uncommon to have the CPU buzzer activate.

If you still have the buzzer, then check the oil level sensor and the coolant sensor.
Old 01-17-04, 03:38 PM
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yup its the coolent buzzer, Ill just have to wait and see about the buzzer, it didnt go off when i conneceted the battery cable to look at the lights so maybe thats a good sign. Thanks again Mark...you have helped me fix sooo many of my cars problems its funny.
Old 01-18-04, 04:00 AM
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With regard to the coolant buzzer thing - try looking at the water pump for a leak from the drain hole underneath - if the pump is failing a loss of pressure will trigger the buzzer.
Old 02-01-04, 10:58 AM
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Where is the plug? I've been dealing with my buzzer for a long time. I don't want to end up grounding it. I want to check mine out.
Old 02-05-04, 10:28 PM
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i have been having the same problem, the coolant buzzer keeps going off
Old 02-06-04, 08:58 PM
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http://fc3spro.com/TECH/PROBLEMS/EL/WCL/ccool.htm


-Ted
Old 02-06-04, 11:13 PM
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stupid coolant buzzer thingy,
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