93Euphoria

so I had to replace the alternator and in the process I broke that sensor that connects to it. The plug in one. What is that called & where can i get a new one? It looks like its all part of the harness. The car wont start or anything. whats the good news & the bad news?

96lt1m6

iTrader: (31)

Never seen a sensor that plugs into an alternator.... can you take a picture

tbag_skywalker

There's no sensor on the alternator, are you talking about the little red exciter wire and it's harness?

If its not plugged in, your alternator doesn't have the 12V it needs to produce power to handle the high amperage load that your car's starter, ignition system, and accessories put on it. This drains your battery and you won't be able to start your car because of it.

guppymech

iTrader: (7)

If its the small connector that plugs into the alternator near the valve cover the part number for it is acdelco pt494.

93Euphoria

I dont have a camera. Its not the wire plugs (red) that is screwed on there. Its a click on sensor that is on the bottom. Right next to the valve cover. It cant be scene without taking the alternator off.

93Euphoria

It might be the voltage sensor connector. When it broke my car said check guages and all the guages are ok and voltage was getting low. then the car died on me. also the brake light came on and i didnt have the hand brake up or anything. (strange)

96lt1m6

iTrader: (31)

Is it the small red 16gauge wire that plugs into the alternator?

tbag_skywalker

There is no voltage sensor connector... that red wire that plugs into the back of your alternator by a plastic connector is the EXCITER WIRE, not a voltage sensor wire.

Your alternator won't be able to generator power if its damaged or unplugged.

You have a volt meter on your cluster that is tied to the alternator, and if your alternator isn't generating any power, your car drains the battery and the needle on your volt meter will drop, and then your check guages light will come on.

Again, that small red wire on the back of your alternator is NOT a sensor, it's a 12V exciter wire.

lt1slowz28

spent a full day chasing spark on a friends car, this was one of the main problems.

tbag_skywalker

I think the Voltage Regulator is on the back of the alternator, but if I recall correctly its held in by screws or bolts. There's also the big battery-to-alternator wire but that gets held to a stud/post by a nut, then is covered by a rubber boot.

Only connector that "clicks" on is the exciter wire.

93Euphoria

No its not the red wire its the pigtail im talking about. anybody know what that connector is for if the red wire is for charging the battery?

RamAir95TA

iTrader: (2)

What don't you understand?

There are two wire connections to the alternator. One comes from the battery, one is the red alternator exciter wire with the single wire connection.

THAT'S IT.

Paul Bell

iTrader: (9)

Guppy stated what plug you need. The new plug will come as a pigtail with all four wires, only one wire is used for this application. You'll need to get into the harness of the car near the alternator and find the wire that you broke off the original plug and wire it to the correct contact of the new plug.

The plug is available at Autozone as part 237 and Pep Boys as part PT200.

Spartan7

iTrader: (7)

Just buy the right one.

http://www.eficonnection.com/eficonn...spx?ItemId=563

95mysticta

iTrader: (4)

I can do better then that price from efi if your on the cheap. Do you need the plug all the way up to the pcm lead or you do you need the plug with a bit of wire to cut and solder together?

93Euphoria

I was talking about that pigtail. got it fixed now running like new!