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1. #SEE SPARK IN THE DARK FROM COIL PACK ON 99 SILVERADO HOW TO#
2. #SEE SPARK IN THE DARK FROM COIL PACK ON 99 SILVERADO MANUAL#

The test light should flash.Ī way to check the pick-up coil is to pull the distributer cap, place a DVOM across the leads on the pick-up coil and see if it can produce an AC voltage.Īlso, you can connect a test lead from the white wire (at the coil) and, with the key on, momentarily ground the test lead real fast a few times. Switching happens way too fast for a DVOM to capture.Ī crude, quick way to check if switching is occurring is to connect a test light to the white wire and crank the engine. Over 200 RPM, the ECM takes over and supplies 5V on the tan/blk wire, witch causes the signal converter to be bypassed and, the ECM provides switching at the base of the transistor.Ī DVOM is not the best tool to use to diagnose this system. Under 200 RPM, the signal converter in module (in the distributer) provides the switching at the base of the transistor (in the module) using the pick-up coil for reference pulses. The ground wire is switched on & off by a transistor inside the module in the distributer. The white wire, in the black connector, at the coil is what provides a ground for the coil. The black connector at the coil also has 12V power (red) to the module in the distributer and the ignition coil trigger signal (white) to the module in the distributer. If you have the money to spare, it may be worth it to just bring your machine to a shop if you don’t feel like messing around with all the potential causes.Įven then, it doesn’t hurt to quickly look over some connections before calling in a professional.The gray connector at the coil has 12V power (red) and tach lead (white) Hopefully you find your issue with out too much trouble.Įlectrical problems can be some of the most time consuming. It’s usually something like a bad kill switch or loose wire or connection. That’s it for the most common electrical problems you’ll see with your ATV. I find it easier to remove the stator to do the actual testing, but that can be a pain all on its own. You can do this testing while the stator is still on the machine if you’re able to access it. If you do get a reading on any of the legs, you will need to replace your stator. You should not get any reading on your meter. To check if your stator is shorting to ground, simply hook one lead to a stator leg (through the connector) and the other to the stator body or chassis ground on your machine. If your meter reads OL, that stands for open line, and you will need a new stator.

#SEE SPARK IN THE DARK FROM COIL PACK ON 99 SILVERADO MANUAL#

But check your service manual for your specs on your machine. You should typically see between 0.1 – 1 ohms for each measurement. You can do this by simply inserting the multi-meter leads into the connector. But I find it’s ok to just unplug the wiring to the ignition coil before removing it. If you want to be extra safe, you could unplug the battery before starting. You will also need basic tools to get the ignition coil on and off the machine. That’s the one I have and use, and I recommend it if you’re in the market for one. If you don’t know what that is, check out this Fluke 115 Compact True-RMS Digital Multimeter on Amazon.

#SEE SPARK IN THE DARK FROM COIL PACK ON 99 SILVERADO HOW TO#

How To Test An ATV Ignition Coilįirst off, you’re going to need a digital multi-meter to test the electrical components of your ATV. It will help to have an ohm meter to check each switch and each wire separately.

Now your task is to go through and disconnect each switch one at a time to find the problem part.

If you got spark after unhooking the main electrical connector, then your problem is one of those switches or the wiring for one of those switches. Doing this will unhook the kill switch, ignition switch, and all the wiring associated with those switches. To do this, disconnect the main electrical connector coming out of the engine. If the spark plug wire looks good, the next step is to check for bad connections or bad switches. Sometimes these wear out because the wire itself is usually exposed to dirt, rocks, and debris while riding. This is the wire that hooks up to the spark plug when it is bolted into the engine. First, you’re gonna want to check the condition of the spark plug wire or ignition coil wire.