No
The starter cut-off relay disconnects the (electric) starter of an engine from the battery in case the voltage drops too low, for on low voltage to starter won't turn anyway (since the starter battery is probably low/ruined and cannot deliver the necessary currents for starting the engine anyway).
your battery voltage is low charge or replace
A run down or nearing end of life battery. Dirty and/or loose battery connections.
To test the starter motor for a diesel engine fire pump, first ensure the battery is fully charged and connections are secure. Next, use a multimeter to check the voltage at the starter terminals while attempting to start the engine; it should be close to the battery voltage. If the voltage is low, inspect the battery and wiring for issues. If the voltage is adequate and the starter doesn't engage, the starter motor may be faulty and should be inspected or replaced.
Low battery voltage will cause clicks, and it is also possible that the starter solenoid is too worn in which case replacing the whole starter is best.
Start by checking the battery voltage and cleaning the connections to the battery. You can use a voltmeter to check voltage or just turn on the headlights and see if they are dim or bright (low voltage = dim headlights). Once battery is checked and your sure it's not the problem, remove the starter and take it to an auto part store. Many auto part stores will test the starter for free. The clicking can be a lack of battery power, poor connection or faulty starter.
It means the battery voltage is low. Can be the battery is defective or the alternator is failing.
Low battery voltage? Perhaps a lose or corroded battery cable Loose starter cable Weak starter solenoid Weak starter
You should locate and test the solenoid. Most have three connections. There is a large cable from the battery to the solenoid, from the solenoid to the starter and from the start switch to the solenoid. The power terminals to the battery and the starter are large and have large cables. The starter switch connection is much smaller. Turning the key to 'start' provides a low current voltage to the solenoid causing the solenoid relay to close and power from the battery cable to connect through to the starter. If that voltage is present then the solenoid or the wiring between the solenoid and battery or solenoid and starter is suspect. If that voltage is missing then the starter switch or solenoid feed line may have failed.
Low battery voltage. Either battery cable may be loose at the battery or at the positive terminal of the starter solenoid. The solenoid contacts are not making when it pulls in. The brushes are worn out in the starter motor. Whack the starter with a hammer while someone tries to start. sometimes that will jar it into working.r
It's what happens when a battery is about to expire.
Could be low battery voltage, a poor connection(s) of wires, a bad starter, or a faulty solenoid.