Question about 1998 Chevrolet Prizm

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98 chevy prizm headlights and cooling fan always on car wont run

I am working on a 98 chevy prizm for a friend, it seems to have an ignition system problem, the head lights and cooling fan run all the time, key in or out, on or off. It starts hard and wont run for more than a minute. We thought that it sounded like ignition switch going bad but I took the switch out and the lights and fan still run when I hook the battery back up. I'm not sure where to look next.

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  • jaccar Dec 28, 2012

    How did you fix the problem? I am having the same trouble.

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Contact a mechanic

Posted on Jul 02, 2009

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1 Answer

Cooling fans always on with cold engine


like all cars with elect fans.
1: stuck relay
2: stuck signal controlling said relay

on older cars the controlling factor is the fan over temp switches
on newer cars the PCM controls all that.
the best way to fix cars is to get the book.
the book is called FSM. factory service manual.

alldata.com

or at toyotanation, dot com.
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2004 Chevy Impala~no interior lights~dash lights work~all fuses look OK~trunk light works. At a loss of what else to do~please help! Ladt night the blower fan decidedto stay on ALL the time~Even after the...


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2001 Blazer Replaced heater core now water pump is squealing and seems like low circulation


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Why does my fan keep running in my 2003 Volvo S 60 after the car is off?


It can be faulty fan relay.The relay is not turning the system off.Or its wire short issue.Even with ignition off ,the fan relay is getting power so its not letting the fan to turn off.Bypass the fan control relay and see if still the fan works with ignition off or not.

For more troubleshooting check the link below:------

Cooling Fan Stays ON with Ignition Off?

http://whatisbyme.blogspot.in/2012/07/cooling-fan-stays-on-with-ignition-off.html
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Cooling fan relays location ?

http://technoanswers.blogspot.in/2012/02/cooling-fan-relays-location-on-1998.html
------------

DIC says "COOLING FAN FAULT"?

http://schematicsdiagram.blogspot.com/2011/12/dic-says-cooling-fan-fault.html
----------

Heater fan and headlights will not turn off with ignition off?


http://technoanswers.blogspot.com/2012/01/heater-fan-and-headlights-will-not-turn.html


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Fuel pump relay and cooling fan relay troubleshooting ?

http://repairhelpcenter.blogspot.com/2011/10/fuel-pump-relay-and-cooling-fan-relay.html

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Where Is Radiator Fan relay and Fuse Located?

http://schematicsdiagram.blogspot.com/2011/12/where-is-radiator-fan-relay-and-fuse.html

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These will help.
Thanks.

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VW Jetta fan, wipers, headlights work until engine starts. Then they do not always function.


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Where to plug in dioagnostic reader 98 chevy prizm


Your spark plugs are damaged

Is that not a no brainer?

Timing belt & you may have major damage
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Need to get a camera inside cylinder to inspect
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Oct 09, 2012 | 1998 Chevrolet Prizm

1 Answer

98 chevy prizm headlights will not go off when turned off


Does your Prizm have automatic headlights (possibly called "Twilight Sentinel" in the mfr. literature)? These systems are notoriously unreliable. Sometimes the control module goes bad for no apparent reason, while other times it fails due to a bad ground in the under-dash wiring harness. Unless you're an electrician, it's best to have it repaired by a dealer. Be prepared for price shock - the module alone is over $250 new retail, not including labor to replace it. There are several variations of the module too, so if you get a used one you need to be sure to get the right one. If it failed because of bad wiring (which was not fixed at the time of replacement), the replacement will fail too in a very short time, possibly immediately.

If you want to tackle the repair yourself, you need to know that the control module is falsely referred to in the wiring diagrams as a DRL "relay". Some Prizm models may have 2 DRL relays, one of which really is a simple relay but the other is the electronic module.

If you happen to have some knowledge of electronics, it's possible to build a bypass circuit which will completely remove the DRL and Twilight Sentinel functions (leaving your car with plain old-fashioned manual headlight control only), using parts of the failed module as a mounting and connection platform, a few wires, and three transistors.

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1 Answer

Fuses panel described in English


Hope this helps your out. I know the diagram and locator is a bit blurry but hopefully it gets what you need.
Drivers kick panel:
Front wiper 20A - Front wiper system Cigar 15A- Cigarette lighter Audio 10A- Audio, remote control mirror Air Bag 10A -Air bag diagnostics Stop lights- 15A -Rear brake light, high mounted stop light ECU B+ 10A - Shift lock actuator, transaxle controle module, radio, engine control module Room 10A - Interior light, clock, ignition key reminder, rear cargo area light switch ABS 10A- Anti lock brake system control unit ECU IG1 10A - Transaxle control module, shift lock actuator, ABS control unit, DRL unit Meter 10A - Instrument panel, back-up switch, electronics time control module, inhibit switch Turn signal 10A- Hazard switch ,front and rear turn lights, turn indicator IGN1 20A - Ignition switch ABS 30A- ABS pump motor TNS 30A- Tail light, license plate light COOL/FAN 30A- Cooling fan Cond/Fan 20A- A/C condenser fan Starter 15A- Start signal , Fuel pump Blower 25A- Blower Motor SR/ACC 10A - Ignition switch Hazard 15A - Hazard and turn signal light D/Lock 25A- Door locks ABS 30A - Anti lock brake system control P/W RH 20A- Power window motor right hand P/W LH 20A- Power window motor left hand IGN2 25A- Ignition Switch
Engine compartment :
Head 25A- headlights IG 2 30A- Ignition switch IG coil 15A -Ignition coil, condenser,generator IC regulator, diagnostic connector. O2 down 10A- Rear O2 sensor O2 up 10A- Front O2 sensor Fuel pump 10A -Fuel pump unit Injector 10A -Fuel injector ,camshaft positioning sensor, purge solenoid valve, EVAP, IAC actuator, Mass Airflow sensor, EGR stepper motor. fuel pump relay coil, vehicle speed sensor. A/Con 10A - A/C compressor controls, cooling fan BTN 30A- Brake light , high mounted stop light. Tail light LH 10A- License plate light, tail light , rear combo light, instrument panel illumination Tail light RH 10A-License plate light, tail light , rear combo light, instrument panel illumination Head low 15A- Headlight Head Hi 15A-Headlight Horn 15A- Horn jlmacman.png jlmacman_0.png

Inside kick panel jlmacman_1.png

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