Strange problem, I'm not sure what is going on. ^___^ my Dad is puzzled to when I called him. He knows cars, but no one in the family has ever had a suburu so its been interesting these past  8 years.  Oh Suburu Loyale, 1990

Anyways my Amp gage keeps dropping to zero. Now I would think that would be maybe I got a bad alternator (replaced less then 2 years ago) or battery was acting up (again, not that long ago) but there is full power. I checked, turned on the fan to full, windshield wipers to high...full power. Even if its reading zero. I'm still going to have the Alternator checked on Monday, but I know what happened when THAT failed and its not doing that.

I start it, it seems normal. I drive around go where I need to do, come out and start the car, it starts fine, sounds fine, but the amp gage does not rise when I start it and sometimes lights come on. Once the engine light, but it went off right away. Today I think another came on, but I could not read what it was, the one nearest to the drives side door. ^^' It may just be a case of the gauge breaking (can they do that?), but I want to figure out if I can find out if that IS it. or if its something thats going to cause me trouble down the road. So if anyone has any info, would appreciate it. ^^

yes, gauges do fail.

get the charging system load tested - most chain auto parts stores can do that for you.

Amp gauge---one of the things I dislike on any vehicle. They only tell you part of the story.

You would be better off putting in a volt meter. If it reads 12 or less the alternator is not charging or not keeping up with the load. If it reads 13.8--14--14.4 the alternator is charging. 

I looked at the wiring diagram for a 1989 Loyal and it is so blurry I could not find the Amp gauge on it.

You may want to try what I did on an Ambulance quite a few years ago.

The driver said he was backing up to park it and it just up and quit. Hardly any thing electrical worked on it. I soon found the Amp gauge had burned open inside the gauge. Voltage on one pin, but not on the other pin. It has two main posts on the backside. I moved all the wires on to the same post and it started and every thing worked. I watched the voltage with my meter and it never went higher than 14.1 volts. Later I installed a Volt meter under the dash.

You know, it is not good to have an Ambulance go out of service because of a lousy amp gauge.

Subaru's do not have an Ammeter or "amp gauge"

They have a voltage gauge.  If it is dropping to zero it's probably faulty.

But if the "charge" light is coming on that may be a sign the Alternator is failing.

Please post in the correct forum. Yes your Subaru is a ‘90 model, but it’s an L series that came from factory with the EA82 engine. Not the EJ series engine that this forum is about. 

Cheers 

Bennie

10 hours ago, FerGloyale said:

They have a voltage gauge.

That's why I could not find it on the wiring diagram.