What is cranking voltage?
Cranking voltage is the battery voltage while the engine is being spun to start. As the voltage falls off, the amperage falls off too. The amperage in the starter motor provides the magnetism necessary to do the work. Battery voltage while cranking can be measured through any engine starting sequence.
Where is the 12V source in my car?
To find a constant 12v source, you will use the positive probe (typically red) of your multi-meter. Start by grounding the multi-meter to a vehicle ground point (metal). Once the multi-meter is grounded, ensure that the ignition switch is in the “off” position.
When to use ignition switched power in a car?
When a car is running (engine on) the ignition (on) source is live (supplying 12v). You can however use ignition switched power when the car is not running but the key is in the ignition (on) position. The ignition (on) source should be used when dealing with high-current applications which include some of the following:
When to use a 12 volt ignition source?
When a car is running (engine on) the ignition (on) source is live (supplying 12v). however use ignition switched power when the car is not running but the key is in the ignition (on) position. The ignition (on) source should be used when dealing with high-current applications which include some of the following:
How do you find the cranking source in a car?
To find the cranking source, start by ensuring that the ignition switch is in the “off” position. Insert the positive probe in any connection (except the constant 12v source). With the ignition switch in the off position, you should not read any voltage on the multi-meter.
How to test ignition switch with test light?
Connect a test light to the ground side of source. Here is what you should get: Key off Brown, Pink and Purple dead Key counterclockwise Acc. Power to Brown wire only Key in run mode Power to Brown and Pink Key in crank mode Power to Pink and Purple If any of these fail, please verify that the plug was wired correctly.