I’m in need of some guidance in isolating an electrical problem.

Here are the symptoms: I started the car yesterday and kept an eye on the gauges as it warmed up. I noticed the ammeter was not moving to charge as it usually does – it was holding dead center or perhaps a very slight discharge at all revs. I flicked the turn signals and got a small discharge with each cycle, no change at revs. I turned on the headlights and saw no movement on the ammeter (no discharge), no change with revs. I drove the car a bit to see if anything would break loose and begin operating normally, no joy.

Here is some background info: the car came off a full resto two years ago. It has a new (re-man) alternator, voltage regulator, and battery. All wiring is OE and in excellent condition. I’ve got Dave’s relay kits on the headlights and turn signals. The car is a typical garage queen and gets about 1k miles each year. I keep a maintainer on the battery while the car is garaged.

I’ve checked the FSM but most of what it covers is over my head – I’ve no prior experience at troubleshooting engine electrical problems. I suspect I’ve got a bad alternator or regulator. I’ve got a multi-meter and know how to use it – just not how to apply it to this problem.

Right now the car is down because the radiator came out yesterday for repair this week. A couple of pointers on how to proceed would be much appreciated.

Thanks,.

Jim

Hi Jim,

I'd take a serious look at your re-conditioned alternator. I've got a Jan./71 using the same set with Dave's wiring.

At ZCON 2103 my Z started dying...everything electrical slowed down for some mysterious reason. Long story short it, the alternator had played out.

George

George