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1993 Saturn SC-1 Cooling fan never turns on. - 1993 Saturn SC1

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Does the car overheat at idle? If yes, first check fuse in fusebox in engine compartment. If fuse good, check for voltage at fan connector using test light with engine on and car hot. If no voltage, replace fan relay in engine compartment fusebox. If voltage is present, replace fan. Please reply with any additional questions.

Posted on Sep 09, 2010


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The code P-1651 and 1650 come on on my Saturn SC 1 auto. Does any body know WHAT that code means ? The light is itermitent, some times it stays off for 60 miles some time comes back on in 6 feet . Thanks...

p1650 and p 1651 are quad driver module codes the quad driver controls 4 outputs hence the name quad they are the1 cooling fan circuit
2 a/c clutch
3ses light(service engine soon)
4and shift light

if any of these issuses are malfunctioning they will set the codes you are talking about, the sneaky thing is that if the ses bulb is bad in the instrument cluster it will set the code as well. hope this helps

Feb 05, 2011 | 1997 Saturn SC

1 Answer

Electric cooling fan does not come when the engine starts to heat up

There could be one of several posibilites
1-bad fan
2-bad connection to the fan
3-bad tenp sensor
4-system could have a relay or fuse problem

Oct 12, 2010 | 1993 Saturn SW2

1 Answer

1993 saturn sl1 cooling fan doesnt turn on

First unplug the electrical connector and jumper the fan to the battery.
If the fan spins, then you know that is good and you should look further back in the system. If the fan does not spin then you need to head to a junk yard and find another fan unit, any Saturn up to a 95 will most likely work. There is a temperature sensor in the head, driver side, and that is where I would look next. I believe it is an open circuit when cold and a closed circuit when engine is warm. You can check this with an ohmeter. There are two sensors there, make sure you are checking the right one. The other is for the temp gauge and ECU I believe. Advance can tell you which is which and please note the little connectors are not the same for both sensors.

Jun 08, 2010 | 1993 Saturn SL

5 Answers


If you've owned this car for a while ,you probably know the fan turn on point is very high on the gauge...about 3/4 the way up which is actually quite close to the red zone.The beauty of the gauge is when the fan does come on,it will drop to below half in a couple minutes which tells alot about the cooling system in general. If it has the ability to drop fast ,under half you have a well running cooling system for the most part. Your fan turns on via a coolant sensor signal to the control unit which then signals a relay to energize the fan. In short, you probably need this coolant sensor which is a $21 dollar part...ask for pn#21025106 at any Saturn dealer..the thermostat is connected to the block from the lower hose connector on front of engine which is held with 2 bolts...ask for pn# 21006335...install these two parts and you should be good to go......good luck

Jul 28, 2009 | 1993 Saturn SW1

1 Answer

1993 saturn sl2 heat fan do not work

Cooling fan is controlled by ECM But does have a sensor located under the upper radiator hose at cyclinder head.Yellow & Black wires also check the connector for corrosion,replace also if corroded!! Heater Fan Check for power & ground At blower motor under pass side of dash.One connector.

May 19, 2009 | 1993 Saturn SL2

1 Answer

1993 Saturn SC1 cooling fan doesn't turn on

Two things to check. The fan relay, and the coolant temperature sensor. There may be two sensors, the two wire one is for the computer hence for the ran relay. Buy a haines manual at your local auto parts store. This will help you find what you are looking for, and its only about 15 bucks.

Alternatively you can put a jumper accrss the fan relay to make the fan run whenever the engine is running.

Apr 15, 2009 | 1993 Saturn SC1

2 Answers

Runnin hot

how bout the thermostat???? its on the side of the block by the radiator

Oct 03, 2008 | 1993 Saturn SL2

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