In most cases if it is an alternator then it has an internal regulator
On a Delco, an external regulated alternator has a square plug, while the internal has a rectanguler plug.
To get to an internal voltage regulator first disconnect the battery ground ( negative cable ) then remove the alternator. Make sure you mark the cables on the alternator so you can put them back exactly where they are supposed to go. The voltage regulator is inside the alternator and you will have to take it apart. I'm not sure how the regulator is mounted in your alternator, it might have small studs with nuts on them, or small screws or bolts, or it may be soldered in. In the latter case you will have to cut out the voltage regulator and solder in the new one. If you are going to take out the alternator anyway you should probably take it to a parts store where they will test it for free and tell you if you need a whole new alternator or just the voltage regulator.
what is different between internal dtd and external dtd and advantages and disadvantage plz tell me answer
Different places on different cars. May be internal on the alternator, the parts house can tell you if it is. May be on the firewall or either inner fender. No way of knowing without make and model of vehicle
HI, All of my info and my garage tell me that the voltage regulator is part of the alternator. That's also what I found when I replaced the alternator on my '97. I hope this solves your dillema and yours is running soon. Steve H.
Internal regulators are mechanisms within an organism that control their biological processes, such as hormones that maintain homeostasis. External regulators are environmental factors outside the organism that influence its biological responses, like temperature or availability of nutrients. Both internal and external regulators play key roles in determining an organism's growth and development.
A quick way to check alternator on any vehicle is while engine is running,carefully touch a screwdriver to the spinning part (armature) of the alternator. If it is magnatized, it is charging. If not then alternator is not charging. The voltage regulator (the thingy that tell the alternator to charge) is built into the alternator. Replace the whole thing with a rebuilt unit.
I have a 93 Escort GT that I am trying to locate charging issues with. I just replaced the alternator (which doesn't seem to be the problem). The regulator was located inside the alternator in mine. So it came new with the alternator (whole thing $130 + core). In some though, it is bolted to the outside of the alternator and costs about $70. Take the alternator to any parts store and they can test it to tell you if it and the regulator are working. Don't have them test it while it is on the car. Mine works off the car, but will not work when put on the car. I have some type of wiring issues.
If you put a volt meter across the battery terminals with the car running it should be approx 13+V....if it is less,and possibly fluctuates when you rev the car the alt. is probably bad. As well if the voltage is too high (17-19V)then the regulator is probably gone ( I think it may be internal to the alternator on those)
The voltage regulator is responsible for regulating alternator output. Look at the volt gauge in the dash. If it is too high generally that means that the regulator is bad. Take the truck to Autozone and have them check it for you. They offer this service free of charge and will do it on the truck.
when I experienced this same situation, it was the ground wire from the engine to the body of the car. You should have a ground wire going from the engine block or intake manifold, etc., to the firewall of the car. To test this out, use a piece of wire with alligator clips on either end and and "short" the block/intake manifold to the firewall. Take a look at the voltage regulator. if it is externally regulated it is most likely up near the headlights mounted to the body, if it is internally regulated its inside the alternator housing. Easy way to tell is if there is 3-4 wires on a pigtail going in to alternator, its internal, if there is only 1-2 wires going to the alternator its external. External regulators cost around 10-15$, internals are around 25$. still cheaper than a new alternator. For peace of mind, just take it off and bring it to the guys at the part's house so they can bench test it off the vehicle.
the only reliable way of determing if your alternator has gone bad is to have it tested by an automotive electricial specialist. That is because most modern alternators have the voltage regulator built in, so just testing to see if it is generating will not tell the whole story. Warning signs of alternator/voltage regulator failure are dead battery, but battery can be charged, lights dimming and getting brighter while driving, and hard starting.