What is an externally regulated alternator?
What is an externally regulated alternator?
Internal regulator is inside the alternator. it uses 1 wire. External uses a box with a number of wires attached to it. This allows the removal of the external regulator for a cleaner look under the hood. Single wire is the only way to go.
How does externally regulated alternator work?
When voltage drops below 13.5 volts, the regulator will apply current to the field and the alternator will start charging. When the voltage exceeds 14.5 volts, the regulator will stop supplying voltage to the field and the alternator will stop charging. This is how voltage output from the alternator is regulated.
Can a mechanical alternator be replaced with a solid state regulator?
While you can purchase a newer solid-state regulator to replace the mechanical one, they are still external to the alternator and that creates the opportunity for problems. As I said, there are three wires connecting the alternator and regulator. Each has a female spade connector on both ends.
What’s the problem with an externally regulated alternator?
The problem with externally regulated alternators is several-fold. First, the external regulator is mechanical. It has contact points that open and close 10–20 times per second to take the alternator’s native 17-ish-volt output, turn it on and off quickly, and average it down to roughly 13.5 volts.
Can a car alternator be serviced from the rear?
Older models have externally mounted regulators. • Unlike other manufacturers, this model can be easily serviced from the rear on the unit. • The rear cover can be removed to expose internal parts. • However, today’s practice is to correctly diagnose the problem and replace the alternator as a unit, should one of it’s internal components fail.
Where can I find the alternator regulator plug?
Both the regulator and its three-pronged plug can simply be left in the engine compartment to retain the appearance of originality. A very minor adaptation is needed to connect the D+ line from the dashboard warning light to the back of the new alternator. D+, as I said, is one of the three wires in the three-prong connector.
Is the alternator in my car internal or external regulated?
That square box in your picture looks like an external regulator, so if that alternator goes with that regulator, it is externally regulated. However, that alternator doesn’t look like my externally regulated GM alternators.
While you can purchase a newer solid-state regulator to replace the mechanical one, they are still external to the alternator and that creates the opportunity for problems. As I said, there are three wires connecting the alternator and regulator. Each has a female spade connector on both ends.
Can a stuck regulator cause an alternator to overcharge?
The external regulator usually has three electromagnetic contact switches inside its housing that open and close. A stuck contact switch that refuses to disengage will cause an overcharging problem. The internal regulator, or “internally regulated” regulator, has been used as a replacement for older, externally mounted regulators.
Why do you need a high output alternator and regulator?
To avoid high charge losses due to heat and hard use, a high-output alternator is recommended. An advanced alternator regulator will maximize charge efficiency and protect your batteries & charging system. We carry regulators for both lead and lithium systems.
