Locating The Starter Solenoid In Your Vehicle
The starter solenoid (also called the starter relay) relays a large electric current to the starter motor. It gets the power from the battery. If you turn the ignition key to the ON position, there is a small electric current that passes thorough the solenoid. The starter solenoid will then close a pair of heavy contacts that relays a large current to the starter.
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The starter solenoid is a fairly simple mechanism that transmits electrical current from the battery to the starter. When you turn the key, the solenoid engages, using the electrical motor in the starter to get your engine running. If the solenoid is not functioning properly, the vehicle may not start. Determining whether the issue is the starter solenoid, the battery or the starter itself can save you time and money when repairing it yourself and seeking to have the repair work done. Start by locating the starter and work to narrow down the cause of the issue.
Questions & Answers for: GMC starter solenoid bypass
Also, is the car up-to-date on routine maintenance such as air and fuel filters, spark plugs and the like? When ambient temperatures drop below zero, the vehicle is nearing its operational limits, meaning routine maintenance can make the difference between starting and not starting.
Most large Kohler engines on riding lawn mowers use an electric starting system. Part of that system is a starter solenoid. The cylindrical solenoid is a low-amperage relay that safely completes the high-amperage electrical connection between the battery and starter motor when the ignition key is turned. A bad solenoid can deny electricity to the starter motor and prevent engine startup. But other basic problems may also exist.
Diagnosing a Problem
We once had a riding lawnmower with a bad solenoid and would keep a long screwdriver in the glove box to use every time we needed to start it. We would reach in and touch the screwdriver to both the ports on the solenoid, and without fail, the lawnmower would start right up every time.
When your starter is working as it should, turning the ignition key sends a low current (12-volt) signal through the clutch safety switch to the small terminal on the solenoid. The solenoid then engages the starter gear into the flywheel and sends current to the starter motor. The starter in turn spins the starter gear, which engages the flywheel, and your tractor starts. If your tractor does not turn over when you turn the ignition key, you may have a bad solenoid or a bad starter motor.
These diagnostic instructions apply to both gas and diesel engines. If your engine will not crank over when you turn the key or does so intermittently, then check the following in the order listed. Remember to always start with the simple and inexpensive first and then move on to the more complex-expensive. You can not believe how many times people have had their starter motors replaced only to discover it was a bad switch or poor electrical connection!
The two small terminals are energized by a relay when you turn the ignition key. That makes the solenoid close the contacts between the two big terminals and supply power to the starter motor. So, you have already effectively jumped the solenoid by shorting the large terminals with the screwdriver.