I have not checked the system thoroughly but your last statement
seems to ring true. I don't think I ever saw the amp gage go anywhere but
to the negative side. I need to do some better testing and observation of
this system the next time I work on it.
Any idea how an amp gage should be wired into this alternator
From: Smit, Theo [mailto:Theo.Smit@dynastream.com]
Sent: Friday, April 27, 2012 12:21 PM
To: email@example.com; firstname.lastname@example.org; email@example.com
Subject: RE: [Tigers] MK II wiring help
One way to evaluate the overall wiring correctness (regardless of where,
physically, the connections are made) is to observe the ammeter readings
under some different conditions: 1. Everything off: Reading is at zero. 2.
Ignition off, headlights on: Reading shows about -8 amps (discharge due to
about 100 watts of lighting) 3. Headlights off, ignition on, engine not
running: A small negative (discharge) value. Turning on ancillaries such as
heater, wipers, brake lights, headlights should each show negative values
according to their approximate current draw. 4. Engine running: You should
get a positive reading, starting at a higher value (20-30 amps) immediately
after the engine is started, tapering down to probably about 5-10 amps after
a few minutes. This should not change if you turn on headlights, or other
accessories, although the needle might flicker when you first turn on or off
heavy loads such as the headlights.
If you only ever get readings in one direction then it's miswired.