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Do you know how to test automotive electrical circuits ? Do you know what a electrical wiring diagram is. Have a DVOM - digital volt ohm meter ? How about a automotive relay , do you know what it is an how it works ? Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model ,engine . Under system click on engine , then under subsystem click on starting. Click the search button ,then the blue link . You will see all the componets involved in starting the vehicle. ignition switch , starter range switch , starter relay , PCM -powertrain control module . When you turn the ignition switch to the start position it sends a voltage signal to the PCM , this tells the PCM start is requested , in turn the PCM energize's the starter relay . This will close contacts inside the relay allowing B+ voltage at pin 30 of the relay to go to the starter solenoid . engaging the starter . Checking fuse's an power an ground , testing relay control . . Videos on youtube for electrical testing. Electric Testing Techniques You Need to Know Relays Understanding Diagnosis and Testing Relayed Circuits Pt1
Do you know how to do electrical testing using a DVOM - digital volt ohm meter ? How to use a wiring diagram to find test point's in a electrical circuit ? This how we find an fix electrical problems on automobiles . Electric Testing Techniques You Need to Know
can it be the starter ignition switch?? Guessing is not the way to a fix . TESTING is !!!!
Maybe you fried the PCM - engine computer !
http://www.bbbind.com/free_tsb.html free wiring diagrams . Enter your vehicle info. year , make , model an engine size... Under system click on electrical distribution , then under subsystem click on power distribution . Click the search button .Then click on the blue links one at a time . Take your volt meter an check for B+ voltage into the ignition switch then in start test for B+ voltage out . And if you don't know how to test like this ,your best bet would be to take your vehicle to a qualified repair shop that does !
System operation System arms 5 seconds after switching ignition OFF. Switch ignition ON. Ensure clock LED illuminates for 3-5 seconds. If LED flashes rapidly at regular intervals for approximately 1 minute, then flashes at irregular intervals: Key code not recognised. Remove key and try again. Programming When System malfunction: LED illuminates for 1 minute, then flashes at irregular intervals. Key(s) added or replaced. NOTE: Replacement keys MUST have blue mark. Keys with red mark are NOT compatible with this system. How NOTE: Programming method using vehicle keys can be deactivated using diagnostic equipment. Obtain 2 programmed keys (A and B). Insert key A into ignition switch. Turn ignition switch to position II. Wait 1 second. Switch ignition OFF. Remove key A. Insert key B into ignition switch within 5 seconds. Turn ignition switch to position II. Wait 1 second. Switch ignition OFF. Remove key B. Within 10 seconds: Insert key to be programmed into ignition switch. Turn ignition switch to position II. Wait 4 seconds. Switch ignition OFF. Wait 5 seconds. Start engine. If engine does not start and clock LED flashes: Switch ignition ON. Wait at least 20 seconds. Switch ignition OFF. Repeat programming procedure. Repeat above procedure to program remaining keys. Keys can also be programmed using diagnostic equipment
close, there is an emergeny fuel shutoff switch hidden in the trunk of these things burried under the carpeting, you probably have something resting on it OR water got on it and is shorting it out, my friend had a 92 taurus 3L and the switch was in the trunk, 14 inches off the trunk floor on the drivers side wall, should be a small **** in the carpeting you can push your finger through and feel it.
I don't think so. I got a 95 and I've done all kinds of electrical checking for various things and to my knowledge there isn't. There's fuses for the ignition and engine along with other electrical items but no specific computer fuse that would turn off a computer. I assume the car won't start?
If your car is simply not starting it could be something as simple as the neutral safety switch if you only hear a click turning the key. Disconnect under left side dash. White and has a green and black wire coming from button behind clutch pedal.
If car cranks but just wont start then could be numerous things. Check the 30 and 40 amp fuses under hood. Make sure battery terminals are connected tight and clean with brush tool if needed. If battery is fine and charged, I assume you have checked, then I'd focus on the ignition system.
magnetic pellet ,doesn't have one . Besides it's not a magnetic pellet . It would be a resistor pellet for the anti- theft system , which your vehicle does have . And it wouldn't be the ignition lock cylinder either if you can turn the key to the start position . Possibly the electrical part of the ignition switch . Viewing a wiring diagram for power flow and checking with a DVOM - digital volt ohm meter would be the proper way to diagnose .Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine size . Under system click electrical distribution ,then under subsystem click on power distribution . Click the search button then the blue links . The light's work because they have seperate power supply ,looking at first diagram you will see this . Thrid diagram down is ignition switch power feed . Top right of the page you will see the letter A , that gets B+ voltage from fusible link B . Finding the ignition switch under the dash on the bottom of the steering column an testing for B+ voltage on the red wire . If B+ voltage is there fusible link is good . Fusible link B is attached at the starter solenoid .B+ stud . If there is B+ power to the ignition switch check for power from the switch .Can you figure that out ? You should also check out some videos on youtube for basic automotive electrical testing . Electric Testing Techniques You Need to Know
The anti-theft system has nothing to do with spark . When it won't start check for B+ voltage at the ignition module . pin P a pink wire . Check pin K for a good ground . Check the 18X & 3X crank sensor signals to the PCM . It's good you have a snap on scan tool an can check sensor data , but to check cam an crank signal's you really need a scope ! Does your snap on tool have a lab scope ( oscilloscope ) Do you know what this is ? How to test crank sensor on GM 3800 engine 3x and 18x signals
Do you have access to wiring diagrams ? Check electrical distribution in an out of the ignition switch .Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info Year , make , model and engine size . Under system click on electrical distribution , then under subsystem click on power distribution . Click the search button , then the blue link ! I wouldn't think the ignition switch being the problem but you never know without testing ! Do you know how to do automotive electrical testing with a DVOM - digital volt ohm meter ? Using a wiring diagram to pin point areas for testing ? Electric Testing Techniques You Need to Know
TSB'S that GM may have on this car. For what ?