Question about 1997 Suzuki GSX-R 750 V

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Resistence on the switch seems low does this effect spark? I have no spark

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Which switch? Kill/ign switch? All switches should ohm out to 0. Pure continuity. Cheap meters will read 1.2-1.6 and jump around a lot. Water in the Stop-Run-Stop kill switch is a notorious problem.

Posted on Nov 13, 2009

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Posted on Jan 02, 2017

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Van starts but stops immediately. Fuel pump?


Many parts stores have loan-a-tool pressure gauges. What are you working on? Older cars have two wires to the ignition coil. On is a start only wire which is active only in the start position of ignition switch and bypasses the resistance circiut to supply 12 volts to the coil when starting. This is done to cause a higher voltage, lower amperage spark to assist in starting the engine. When you release the key, juice to the coil goes through a resistance wire (chevy) or ballast resister (mopar) to send about 6 volts to the coil to give a lower voltage, higher amp spark for more efficient fuel burn. That said, more modern cars don't use these 2 circuits.

Feb 11, 2015 | Cars & Trucks

1 Answer

I have a 2001 roadking it has no spark


Remove the plugs and visually check the condition of the plugs and then reinstall them and leaving both plugs installed remove the spark plug cable from one of the spark plugs and THEN attach the HT cable to a SPARK TESTER and clip the tester to the cylinder head bolt and crank the engine over looking for spark and repeat the procedure on the other cylinder also. Be aware that the Engine will not spark with both spark plugs removed, so when checking for spark, use a SPARK TESTER with both plugs installed.



If you have no spark test the coil first. There should be power to the coil primary all the time the run switch and ignition switches are ON. If not check all switches, relays and fuses.

If the CKP is defective you will also get no spark so check it last.

Test the primary coil resistance on your coil. Disconnect all the wires going to the small terminals (primary) on your coil. Using a good ohmmeter on Rx1 setting, test the resistance between the two small terminals. You should read somewhere between 2 and 3 ohms. If you read more, the coil is bad. Before you do this test short out both leads of the ohmmeter and if the reading is not zero you will need to write down or otherwise remember the number and subtract it from the reading you get from the primary circuit test or you will have an incorrect resistance reading for the primary wires because you will also be reading the ohmmeter internal resistance and/or the wire and lead resistance added to the primary wiring resistance.

You can also test the coil by leaving the "hot" wire on the coil and replacing the other side (ground side) with a short piece of wire. Turn the ignition on and temporarily ground the short piece of wire you put on the "out" (ground) side. When you take the wire away from the ground, (which will collapse the primary current into the secondary) you should see a spark at the plugs if it is a wasted spark system or at one of the plugs if it is not a wasted spark system. If you have current to both sides of the primary of a two part coil both plugs should get a spark whether wasted spark system or not as you are energizing both sides of the primary and collapsing both into both secondaries at the same time when you remove the ground wire from the cylinder head ground.

MORE:

Ignition Coil Primary Circuit Test
Remove the coil. THEN set your ohmmeter scale to RX1 and place ohmmeter leads on the primary coil windings A (front of coil) to B (middle of coil), B to C (front of coil) and check for primary coil winding resistance which normal resistance range is 0.5-0.7 ohms. If primary resistance is not within this range check out test results below.

Ignition Coil Secondary Circuit Test
With the ignition coil removed from the motorcycle and the ohmmeter set to the RX1K scale place the ohmmeter leads on the secondary coil windings B (middle terminal) to
R (rear secondary terminal/socket), B to F (front secondary terminal/socket) and check for secondary coil winding resistance which normal resistance range will be 5.5-7.5K ohms. If secondary resistance is not within this range check out test results below.

Test Results
A low resistance value indicates a short in the coil winding which requires coil replacement.

A high resistance value might indicate that there is some corrosion/oxidation of the coil terminals requiring the coil terminals to be cleaned and the resistance test then repeated and if after the test is repeated the resistance is still high after the terminals were cleaned the coil must be replaced.
If there is an infinite ohms or no continuity) resistance value the coil is open and must be replaced.

Sep 29, 2014 | Harley Davidson Motorcycles

1 Answer

No spark


Did you check if you had voltage present .

Jul 17, 2013 | Motorcycles

1 Answer

I have a 92 Yamaha jog. My first problem was bad fuel **** and no air filter. I replaced both and had spark but ignition was stolen so I crossed the brown and red wire and kick started it it ran around the...


possible ignition coil or control box burned out? In general with an electric start engine, cranking load drops the available voltage to 10 volts or less so the ignition coil primary winding is wound to operate on 9 volts. So while cranking, the coil is fed battery available voltage. when the start button or ignition switch is returned to the run position, the coil is fed through a ballast resister that drops battery voltage, around 12 to 14 volts to 9 volts. if the ballast resister is bypassed and full battery voltage is fed to the coil, it will overheat and burn out.Check the primary coil resistance, it should have a low resistance or continuity. If burned out, it will have no continuity or a very high-to-infinity resistance.

Jul 30, 2017 | Motorcycles

1 Answer

G16b no spark efi


The fuel pump relay has four pins. Two pins relate to low power switch circuit from the ECU and the other pins relate to the high current switched circuit which has a permanent power in and switched power out (to fuel pump). Check that the ground on the lower switch circuit pins is good and then check that when the ignition key is in the 'on' position that the low power switch pin has 12.6ish volts supplied to it. If there is no low power switching supply then the relay cannot function. If there is low power supply but no voltage switch on the output then the issue sounds like the relay itself. Pull the relay out and check that it clicks when 12v is dropped across the low circuit pins. Check the resistance across the high current output circuit pins when the low pins are given 12 volts. As 12 volts is applied across the low voltage pins the resistance across the high current output pins should drop to near zero as the internal contacts are closed. As the low side voltage is removed the high side pin resistance should once again register open circuit (infinite resistance). If the relay clicks but fails to output then either replace the relay or open it up and get a nail file and draw it between the contact pins to remove any corrosion.

May 23, 2012 | Cars & Trucks

1 Answer

Air conditioning switch on dash doesn't seem to work. How can I test it?


Remove the wire plug to the AC switch and then use DVM (Digital Volt meter) set to resistance at say 200 ohm range and use the meter probes across the two exposed terminals of AC switch (depressed position) to see if you read low resistance. If so it shows switch is working.

Mar 25, 2012 | 1989 Toyota Camry

1 Answer

Hi, I have a Super 10-10 chain saw, it all of a sudden, quit running. I checked there was no spark. The wiring seemed okay. I took off the capacity, and measured with meter. It seems open circuit. Is...


If you are speaking of a capacitor, it should should appear open on ohms, but if you reverse the leads, the meter will show resistance for a short time as the capacitor charges. Reverse them again and repeat the previous. There should be a set of points that should open about 0.020 inch or 0.5 mm, and the point contact surfaces should look dull gray. Check ohms from the open, moving contact to engine metal--should read fairly low. Check the stop switch to make sure it reads open when in run position. Check for spark with a fresh plug as the old one may have shorted out.

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2 Answers

2003 sportsman 700. no spark at plug. off/ run switch is in run position. why no spark?


Have you been running the bike with a low battery? Have you changed the spark plug? Have you checked that a fuse isn't blown? Check these items if all is good, chances are that the pulse coil or pick-up coil is shot, could also be the stator. Have someone who knows how to check it for hons of resistance.

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1 Answer

My a/c stopped working all of a sudden in my 2000 vw beetle. I have replaced the blower motor resister which didn't effect the a/c coming on. I was told that it could be the a/c switch. Could this be the...


the switch you are refering to is a low pressure switch which actuates the clutch. But you need to put gauges on the system to read the pressure. a low charge will not allow the clutch to turn on. The pressure switch ma also require emptying the system to install a new one.

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1 Answer

JL 500/1 Problem


You need the old transistor. Knowing it's brown is not enough; you need to know its resistance value. It sounds like the resistor you replaced with has too low a resistance value, causing the "cuts" in sound. Find the old resistor and then use this site to find out what you need:

http://www.dannyg.com/examples/res2/resistor.htm

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