Question about 1991 Honda Accord

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No power to the coil

Have power only on one side of the plug that goes to the distburtor,so i jumped the wire an it starts what will stop the power from switching to the coil wire....

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Relace the ignition in the steering column

Posted on Jun 21, 2009

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Posted on Jan 02, 2017

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I HAVE 1971 OLSMOBILE CUTLAS NEED WIRING DIAGRAM BECAUSE PREVIOUS PERSON WHO WORKED ON CAR TAPPED IN TO THE DISTRIBUTOR WIRE


Kinda hard to post a hand drawing, but basically the wire to the the distributor comes from the coil terminal that has only one wire (unless it also has a noise suppression capacitor. The other side of the coil has two wires, one goes to the ignition switch "on", and the other wire goes to the starter "start" terminal. This is done so that full 12 volts go to the coil when cranking (so that the spark to the plugs is higher voltage and jumps the plug gap better for starting, and because the wire going to the ignition switch has a resistance section that reduces the voltage and we know from ohms law that when the voltage is reduced, the amperage increases, thus causing a fatter spark to assist in fuel mileage and cleaner burn. I bet you can do a search for basic car ignition circuit in 1970.

Mar 03, 2018 | Cars & Trucks

1 Answer

Ford 3.0 no power to coil


The PCM doesn't supply power to the coil's ,it supply's a ground . A fuse supply's B+ power to the coil's . Your vehicle has what is called coil on plug ignition system , a coil for each cylinder . Should have plug wires ,has a spark plug boot . IT is common for these coil on plug system's to fry the driver (transistor) inside the PCM ,if the spark plug gap becomes so worn that the spark can not jump said gap. It shorts inside the coil sending high voltage to the PCM driver . There are video's on youtube showing how to test a PCM driver circuit . Your coil has two wires , one should have B+ voltage an the other goes to the PCM . If your coil fried i look for a short to ground on the control side circuit . This video is for a ford 5.4 l V-8 coil on plug system ,same thing just 2 more coils .
Ford 5 4 shorted coil primary winding and bad computer driver

Sep 26, 2017 | 2005 Ford Escape

1 Answer

2000 chev wont start at key


I think the purple wire (or maybe the yellow) from the neutral safety switch goes to the coil side of the starter relay, turning it on so power is sent from there to the starter solenoid. You could check for this signal to the relay with a test light. The key must be held in start while you probe the other two terminals for the relay. If the signal is there, either a bad relay or the coil side of relay is not grounded properly. It is possible that the coil side ground is the neutral safety switch-grounding the relay's coil side only in park or neutral-in which case the nagging light on shifter (between off and run, it only works?) may be telling you the safety switch is the problem.

You may need to look at a wiring diagram, Greg. But the starter relay is the last component in the start circuit before the starter solenoid. From battery to ignition switch to "crank" fuse to neutral safety switch to starter relay to starter solenoid to starter-and back to battery through ground. That is the start circuit. Just that the wiring tying them all together makes it complicated.

Apr 10, 2014 | 2000 Chevrolet Silverado 2500

1 Answer

No power to coil


Check the pink wire. It goes from the ignition switch to two circuits in the under-hood fuse box and the ignition coil. One circuit goes to ENG-1, ECM-1, IGN-E. The other circuit goes to GAUGES, FUSE 4, AIRBAG FUSE 10 and TURN/BU FUSE 16.

If all those fuses do not have power when the ignition switch is turned to start or run check the pink wire as it comes from the firewall connection. If you don't have power on the hood side, there may be a bad connection between the two halves of the connector.

If you do have power on the pink wire on the hood side of the firewall then you may have to check it between the coil to the firewall connector and underneath the under-hood fuse box.

I would use a tone tracer on the pink wire while the ignition switch is in the off position. (turning the switch off makes the wire only go in one direction, to the engine compartment) The tool sends a tone signal through the wire (in this case it would be hooked up to the pink wire) and has a receiver that lets you follow the tone in the wire without having to open the wire harness. You can just follow the wire harness and hear the tone signal. if there is a break in the wire or the connection is terminated somewhere in the circuit the tone will stop. Makes it a lot easier to trace a wire.

Nov 17, 2017 | 2000 Chevrolet Blazer

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

No start on old gasoline forklift engine.


most likely the ign switch is ok if you are getting spark. so you have a hot spark at coil and weak fire at plugs? if you have a test light check the positive side of coil for power when turning key on and cranking. if it is dropping power on positive side then ign switch could be bad. can "hotwire" coil by jumping a wire to positive side of coil to pos of battery this will eliminate ign switch.

Apr 07, 2010 | 1978 Chevrolet C1500

1 Answer

I relaced the coils but still see spark jumping under the hood


YOU want to stop the coil wires from jumping ,,,,apart from replacing all leads etc ,,all you have to do is to SPRAY IT ALL WITH hair spray
Yes hairspray but let it dry for 1/2 hr before starting
as h/spray is good for all wiring . you can also spray HTLeads Plugs and Battery term.

Sep 30, 2009 | 1998 Saturn SL

1 Answer

No power to fuel pump and no spark jump power to


Spark comes to the plugs, via through the ignition switch ( in the on position) to the primary side of coil. Possibilities ignition switch, distributor cap , rotor, plug wires, coil, control module. If you remove the coil, control module these can be tested at Autozone for free.

Jul 13, 2009 | 1987 Ford Econoline

1 Answer

First problem won't start unless I jump across


Okay I want to say get an ignition switch for the starting problem. The wire that makes the solenoid work comes from the s terminal on the ignition switch. The ignition (i) side of the ignition switch goes to the coil. The running and dying could be the coil. Both wires start at the ignition switch. Check those two wires for connections. Take out the switch and see if the (i) and (s) terminals do anything when you turn the key.

Jun 30, 2009 | 1987 Ford Ranger

2 Answers

1988 jeep comanche will start only when you hold tumbler in the start position, when you relese it, engine stops.. engine is a 4.0 auto, fuel injected 4x4


If the car has a resistor coil with a ballast resistor to drop voltage from 12 to 8 then check the resistor wiring. When you engage the starter tumbler it by passes the ballast resistor and sends 12 volts straight to the eight volt coil to get good spark. When you release it the 12 volts goes through the resistor to 8 volts and then the coil. If there is a fault in this circuit the engine stops. Jump the 12 volts straight to the coil and start it. If it keeps going the ballast circuit is faulty. Paul

Jul 27, 2008 | 1986 Jeep Comanche

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