HELP! - 78 Euro w/ 4.7L euro engine

There are about a dozen ground points on the car. No dash removal needed. I don't have the tech sheet handy, but each of those should be gone through and cleaned.

Also, take a look at the 14 pin connector by the battery jump post. Pull it off, pop the top, ensuring you don't knock the pins out and check for corrosion. It is not uncommon that the wires from the starter to this point are bad. There is a good chance you will have to peel the insulator/harness cover from it if you find a bad spot.

I'd not keep looking at the alternator, but looking at the harness/grounds on the car.

SeanR;1213 wrote: There are about a dozen ground points on the car. No dash removal needed. I don't have the tech sheet handy, but each of those should be gone through and cleaned.

Also, take a look at the 14 pin connector by the battery jump post. Pull it off, pop the top, ensuring you don't knock the pins out and check for corrosion. It is not uncommon that the wires from the starter to this point are bad. There is a good chance you will have to peel the insulator/harness cover from it if you find a bad spot.

I'd not keep looking at the alternator, but looking at the harness/grounds on the car.

Sean,

On my '90 GT, in the past couple of weeks my alt. gauge will go from charging fine to zero. I happen to have a Porsche Hammer on loan to me, but this won't tell me the issue, correct?

Does this sound like perhaps just a gauge issue? This is going to be my first Frenzy prevention issue.

Hammer won't tell you anything about the charging system but it is great for all sorts of things.

Can you duplicate this at idle in the garage? If not, wire up a multi-meter at either the battery or jump post, (long leads) and go for a drive. If it does looses charge on the multi-meter the same time as the guage, I'd say charging issue.

SeanR;1221 wrote: Can you duplicate this at idle in the garage? If not, wire up a multi-meter at either the battery or jump post, (long leads) and go for a drive. If it does looses charge on the multi-meter the same time as the guage, I'd say charging issue.

It is intermittent, but happening more often lately. And of course as a 928 owners of many years, I do have a multi-meter, just have been lazy in using it

SeanR;1221 wrote: Hammer won't tell you anything about the charging system but it is great for all sorts of things.

Can you duplicate this at idle in the garage? If not, wire up a multi-meter at either the battery or jump post, (long leads) and go for a drive. If it does looses charge on the multi-meter the same time as the gauge, I'd say charging issue.

Checked the battery before starting the car, it was @11.4v
Started the car, and the alternator gauge stayed at zero.
The battery volts jumped to @13.4v
I presume this is conclusive that it is a gauge issue, not an alternator issue, correct?

Stan.Shaw@Excell.Net;1349 wrote: Checked the battery before starting the car, it was @11.4v
Started the car, and the alternator gauge stayed at zero.
The battery volts jumped to @13.4v
I presume this is conclusive that it is a gauge issue, not an alternator issue, correct?

Correct Stan. She is charging so now you have a good direction and can check where the charge lead comes into the car. I can't help you there but I would be tracing the schamatic. at work now