Question about 1994 Jaguar XJ6

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No power to ems relay,ignition amplifier,or ignition coil . fully charged battery with 12.66 volts coming out of ignition on relay

Where does the power from the ignition on relay connect with the power wire for the ems relay,ignition amplifier and ignition coil

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  • 133 Answers

Check the power at the relay at right front fuse box if no power check back wire as it runs to the relays beside the radiator.

Posted on Nov 28, 2014

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Posted on Jan 02, 2017

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SOURCE: 2000 jaguar s-type. The problem is if parked

no it not possible. more like internal light or boot light left on.

Posted on Apr 26, 2010

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SOURCE: car has new fully charged battery yet it will not

Hi my name if Tom and I am here to help you.

If the battery is good and the car will not turn over it is usually the starter or starter solenoid. The solenoid makes a clicking sound when the key is turned.

If you take the starter off, the starter solenoid fits on top of the starter. You can take both to an auto parts store and they will test it for you while you watch.

Now you will hear the click and it will start or not. Sometimes as the starter gets old it heats up when you use the starter a lot(cold weather start ups).

If you need help with how to remove the starter, let me know and I can walk you through it. Also, please take the time to grade how helpful I was to you.
I can then be of greater help to you and others in the future. Feel free to call or email me.

TomE(414-475-5968)

Posted on Jul 02, 2010

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2 Answers

Replaced bad fuel pump. Still will not start. Only 6 volts at the pump relay. Bypassing the relay indicated pump is working and plenty of pressure. Checked all the fuses all are good. Any ideas?


Year make and model ?
You should have two hot circuits to the relay. One is for the pump and the other is for the coil of the relay. Usually power comes from the key switch.

Jan 01, 2016 | Cars & Trucks

Tip

Engine electricals




3) Spark: From battery to spark plug

The battery is the source of stored electrical power in the vehicle. A voltmeter between the terminals of a healthy battery should read 12.5 volts. A reading of 12.2 volts indicates a flat battery and a reading of 10.4 volts indicates a dead cell (each cell beingabout 2 volts). A battery should be capable of sustaining high current, as needed by the starter motor when turning the engine over. When the car is running the voltage measured across the terminals shouldbe between 14.2 and 14.5 volts. The value is the voltage being supplied to the battery by the output charge from the alternator. THis charging voltage should not alter much when additional load is applied to the battery (head lights on etc).
When the ignition key is turned to the second position,often referred to as 'key on engine off', all car functions are powered up including lights and fuel pump. When the key is turned to position 3 many ancillary functions are temporarily interrupted to allow the battery to meet the extra needs of the starter motor. Electrical charge from the starter switch passes through a master fuse and starter relay before energizing the starter solenoid. The starter solenoid moves the pinion gear on the starter motor to engage with peripheral teeth of the flywheel. Simultaneously, heavy copper contacts are bridged by this same movement causing the starter motor coils to become energized thereby turning the engine over.
During the ignition process electrical charge passes through the primary windings of the ignition coil(s). The engine control unit (ECU), taking signalsfrom the engine crank position sensor, collapses the field of the coil(s) appropriate to the cylinder requiring ignition. As the field collapses the secondary coil windings discharge very high voltage through the high tension lead to the spark plug. The charge is so high that at the spark plug gap the charge jumps across with a spark. The compressed fuel air mixture in the cylinder is ignited by this spark.
Checking the spark process starts with the plugs. The condition of the removed plugs reveals a lot about the nature of the ignition within the cylinders. Dark sooty deposits indicate overly rich fuel air mix and glazed plugs indicate overly hot lean mixtures. Removing the plugs (with the fuel pump relay unplugged) and holding the screw threads to the cylinder head whilst turning the engine over will reveal the quality of spark. The spark holders and leads should be examined for discharge through the insulation to the cylinder head. Removing the leads from the coil should reveal sparks emanating from the exposed connectors. Failure to see sparks at this point indicatesa failed coil (especially if neighboring coils show good spark) or a failed crank sensor if all coils show no spark.
NEXT 1.1 MAF Mass Air Flow sensor

on Jul 15, 2011 | Mercedes-Benz E-Class Cars & Trucks

1 Answer

I replaced the spark plug and ignition coil and now it won't start?


if the car won`t turn over then it could be a starter problem if the battery is as you say fully charged. check voltages at the starter. it could be a bad connection or starter relay.

Jul 28, 2015 | 2001 Lexus RX 300

1 Answer

I repace fuel pump ,spark plugs,crankshafts,,battery,. stil no start only crank.check for fuel pressure no fuel pressure,also sheck for spark no spark ,no power on coil ether.please help 2002 nissan...


Your first problem is no power to the coil/s. This could be the ignition switch or wiring from there to the coils. With ignition on, you should have 12 volts to the coil/s. The ECM grounds it out with help from the crank sensor. If you turn the ignition switch on and have the dash gauges and hear relays kick in, then check for bad/broken wires. Several things come on while in the run position. Like radio, blower fan, lights/gauges in the dash. If they don't come on, first would be checking the switch, then wires. You need a volt ohm meter, electrical shcematics.

Dec 21, 2014 | 2002 Nissan Pathfinder

2 Answers

When the temperature is in the mid to low 30's, 92 Honda Civic will not turn over. No griinding or anything, not even a click. I've been told the battery, starter and carburator are ok. Help! Taxi's are...


Let's see if I can explain it. Pretty simple start circuit, but starting issues are very common to Hondas and Toyotas of the '80's and early'90's. Lots of guys used to rewire their start circuits with new wiring and relays from ignition switch to the starter solenoid just to stop those no starts.
From the ignition switch is the black/white start wire, it is hot only in start, goes direct to the "starter cut relay"- a 4 pole starter relay, the black/ white wire (black with a white stripe) is both the power feed and the coil power to the relay. Before the wire enters the relay it is spliced. one wire goes to power feed at relay, other wire goes to coil side of relay. Here's where the clutch switch comes in: the clutch switch acts as the ground for the relay's coil side. Okay, you turn key to start, power goes to the relay on both the power side and the coil side. When clutch is depressed, it grounds the coil side of relay, this energizes the relay, so power goes out of relay on the power side, as a black/red wire...and goes direct to the starter solenoid. Somewhere before it reaches the solenoid, it turns back into a black/white wire. But nothing else is in a wiring diagram for your start circuit. Buy a can of CRC electronic cleaner. Spray all connectors in the start circuit. Pull off the solenoid wire at starter-that connector. Also the starter relay , pull it out and clean the relay terminals where it plugs in. Get all clean connections in the circuit. If no help, swap in a different relay. If still no help, get a voltmeter (or a test light), when the starter doesn't want to work, check for power at the starter solenoid with key held in start, and clutch depressed. If power there, the solenoid is the problem. If no power, work back to the relay. Pull relay out. With key held in start, two terminals for the relay should have power-the coil plus side, and the power feed from the ignition switch. If both have power, may be the clutch switch not grounding the relays coil side. If no power to relay, check the start wire out of the ignition switch.
Need a wiring diagram? This site is awesome-free wir. diagrams and TSB's for every make and model:

Dec 26, 2013 | 1992 Honda Civic

1 Answer

98 ford expedition won't start, installed a brand new battery, lights come on but when I turn ignition to start lights shut off, and come back on after a second


Check battery voltage, should read 12.5 volts or more. Just because it its new, doesn't mean it is charged to full voltage. If battery is fully charged, and connections are good, then I would look at the starter relay or starter motor.

Dec 06, 2013 | Cars & Trucks

1 Answer

Won t start


Check battery must fully charged, check starter fuse and relay Check 12 volt wire from ignition switch to starter relay in the fuse box ,then check 12 volt wire from starter relay to starter motor solenoid if if it's everything is ok then change the starter.

Oct 20, 2013 | Buick Lucerne Cars & Trucks

1 Answer

No firing on the coils


Vehicle is not indicated. Some cars have Relays for the ignition circuit. If you can reach the wiring for the coils, you should check for power to the coil bundles or paks. If the coil is receiving power then the trigger to deliver the amplified charge is not working.

You can get free wiring diagrams by registering your vehicle on Autozone.com. Then go down to the Help sections and work through some of the sub-headings. Find the Relay for the Ignition and change it.

Please rate my info.

Jan 03, 2013 | Cars & Trucks

1 Answer

I have a 2004 cavalier it has gas and oil but wont start


check see if power going to ignition coil primary terminal, if not check ignition coil fuse.if power going to ignition coil primary terminal, your coils could be bad or you have ignition module fault or crankshaft position sensor and pcm fault,have vechicle code scanned many things will cause no spark conditions, make sure battery fully charged or in good shape you need good 12.6 volts from battery, for pcm and ignition to work properly.

Feb 05, 2012 | Chevrolet Cavalier Cars & Trucks

1 Answer

When the ignition key is turned the dash board lights up but the motor does not turn.


a) Do you have crank no start? (see entire write up)
b)No crank no start ,No dash lights?, ( battery, battery cables, ignition switch,,starter relay)

If you have symptom A then the affected items are , ignition switch, battery, battery cables, starter, starter relay ,coil, coil pack, ignition module ,Distributor cap ,rotor, (if applicable) spark plugs and wires.


.If the battery iS more than 5yrs old OR COMMING CLOSE TO IT DEPENDING ON ITS CURRENT CONDITION you may want to replace it.
If battery does not pass load test replace it.
Whatever you decide the rest of the items can NOT be checked out without a fully charged battery.
Check ignition switch and starter relay for B+ going to them and leaving them. Check starter circuit. Make sure B+ is making it to starter ( use a digital voltmeter). If B+ (12 volts) is making it to the starter and it doesn't crank then the starter is defective. Verify this by removing the starter and have it bench tested.

May 21, 2010 | 2006 Isuzu Ascender

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