What happens when an alternator Exciter is not working?
If the exciter wire is disconnected or not working properly, it will not transmit voltage to the alternator, and as a result, the alternator will not generate enough power to operate accessories.
What kind of wiring does an alternator use?
Three-wire Alternator: This setup uses a battery wire, ignition/warning light wire and voltage sensing wire, Three wires. the alternator to read voltage at some other point than the battery. Or the battery wiring is such that the battery is a long distance from the alternator.
What’s the voltage on a BMW E30 alternator?
When the car sits overnight, the voltage is at 11.8ish, unless I go 3+ days without driving it, then it will be much less 7.8v and, obviously, the car won’t start.
Why is my alternator not reading 24 volts?
If it reads 24 volts, the connections are fine and electricity is flowing between the alternator and battery. If you are troubleshooting one wire and you don’t get a reading, then you know it’s the red cable between the battery and alternator that’s faulty.
Where is the exciter wire on an alternator?
Exciter wire. Battery light. Key Switch. To Battery. Alternator. Basic wiring diagram to , replace the alternator and the exciter wire pigtail. However, as per the Mando alternator wiring diagram, there is a wire on both the exciter terminal and the sensing terminal.
How to fix a wiring problem with an alternator?
How to solve Alternator Wiring Problems 1 Self-Exciting Alternator makes no need for Alternator Wiring Diagram. 2 One-wire Alternator: Is another name for the Self-Exciting Alternator mentioned above. 3 Two-wire Alternator: Most standard and all self-exciting regulator alternators will work using the two wire setup.
Do you need a battery wire for a self exciting alternator?
Is another name for the Self-Exciting Alternator mentioned above. You only need to connect the battery wire (one-wire). The alternator turns on the voltage regulator when the engine starts turning the alternator. Most standard and all self-exciting regulator alternators will work using the two wire setup.
What happens if I Disconnect the EXC wire at the alternator?
If I disconnect the EXC wire at the alternator, the ign light goes out on the switch panel. So this is telling me that no wires were crossed, etc. However, here is the weird part: With the EXC wire disconnected at the alternator, I can put a test light on the end of the wire and to the battery negative.