Lights Flashing While Idling
I have a problem I'm trying to figure out, I'm not 100% sure of the details here, but it's what I've observed so far.
To start with...I have a 1974 CJ5 with the 232 I-6. It's pretty stock under the hood, specifically I'm using the Motorola 37 amp alternator, Motorola Voltage Regulator, and a new battery (a few months old).
I just got the Jeep back on the road a few months ago and it's been doing well, but it started cranking slow, then one day it wouldn't start, would just click. Popped the clutch to start it and drove it home.
I tested the battery voltage and was getting just around 12 Volts, but when I'd try and start it all it would do is the clicking. If I hook up jumper cables to my car, I could start it. I charged the battery a week ago and it tested at about 13.5 Volts. I've been driving it for about a week now, and haven't tested the voltage again. I'll be sure to do that.
However, here's the problem I'm wanting to get some help with. After charging the battery I drove the Jeep over to Autozone to have them test the alternator. When he tested it, he said that everything tested ok, but that the alternator was only putting out about 30 amps. After telling him it was only a 37 amp alternator, he seemed to think that would be fine. I drove home, but when I got home and pulled the Jeep in the garage I noticed my headlights were flashing on and off, as if I were turning them on and off, as opposed to dimming and coming back up. This wasn't just the headlights, but also the dash lights, and I'm assuming side markers and tail lights, but I haven't confirmed this. As it was daytime, I didn't notice it until I pulled in the garage.
I took the Jeep out again a few nights ago and didn't have any problems with the lights flashing while I was driving (moving), but when I would come to a stoplight and sit, they would start flashing, once I started driving again, they seemed to stay on, but once I would come to a stop they'd start flashing again.
I'm not sure what to make of all of this, especially since they're flashing on and off, as opposed to just dimming.
Any ideas what's going on?