Question about 2004 Chevrolet Cavalier
I need to know which wire is the daytime running lights wire. i need to know the wire for the daytime running lights that actually hooks up to the light in the engine bay fuel pump quites workin at times acts like ingition, replaced fuel pump and harness, fuse and relay, is there an emergenancy switch somewere in the circut?
I have had the same problem with my 97 S10. I looked at the GM iring diagram and found that the headlight circuit runs directly through the main headlight switch with no fuse or relay at all. The high low beam switch cannot shut the circuit off completely and therefore make the clicking relay sound that is heard. The daytime running light module looks for a headlight on signal and therefore shuts off the running lights. So when the headlights cut on and off the clicking you hear is the day time running light relay, turning them on thinking you are shutting the headlight switch on and off. Inside the headlight switch itself is a thermal metallic circuit protector similar to whats inside a flasher switch. This is the only logical place for the headlight circuit to cut out since it is a directly wired circuit as explained before. Replace your headlight switch for less than 20 bucks from autozone.
Posted on Oct 27, 2008
Spark......EQUIPMENT NEEDED: 1) fuel pressure Gage....Advanced Auto = $45..... 2) needle nose pliers ( fuse pull )..
There is a fuel pressure access valve located on the fuel injector rail. The access port or "shraider" valve has a black or gray screw on cap. Remove the cap and you will see the valve. CAUTION: The fuel rail is under pressure....before installing the pressure gauge, relieve pressure by starting the engine and removing the fuel pump fuse from the under hood fuse box......
Once the engine quits, turn the key to the off position and safely install the pressure gauge. Put a rag around or under the access valve to catch any drizzling fuel. I always prefer to do this when the engine is cool.
Install the pressure gauge, start the engine, check for leaks and read pressure output at idle, record pressure reading.
Also, it should be checked under load but you will need another person to help.
Once you have shut the vehicle off watch the pressure gauge, it should remain steady and not leak down.
Let me know what the readings are.
Posted on Feb 13, 2009
If you are sure the fuel pump relay is working, check continuity from the pump to the relay socket. These wires love to corrode. When you turn your ignition on, the fuel pump will only run for a couple seconds before it shuts off via the automatic shutdown relay. Make sure you are checking power within this window. The PCM (powertrain control module) is what completes the ground in order for the relay to send power to the pump. If the PCM does not recieve a signal from several sensors (mainly the Crank Sensor) it will not turn on the pump. You may want to check these sensors, is the check engine light on? You can scan it to see if any sensors have thrown a code. Be sure all applicable fuses are ok, the PCM may have its own fuse, check that even if the fuel pump fuse is ok. Your Truck may also have an inertia switch for the fuel pump which shuts it off during an accident. Check that as well.
Posted on Mar 20, 2009
1996 Chevrolet Cavalier 2.2L SFI OHV 4cyl
This is a sample for an 1996 2.2L (VIN 4) engine schematic...
You can find more details and the Repair Guide about your model in autozone.com (free register). Select the Year, Make, Model and Engine for access.
I hope help you with this (remember rated this help) Good luck.
Posted on Oct 14, 2009
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