Help- Problems with my 67's electrical system

[isfn13]

I have recently rebuilt my 289 small block and it has run fine except for the last few months. Somehow I have a ground in the system that is not allowing the battery to charge fully. I have replaced my alternator, voltage regulator, and tested my battery none of the above is the problem. If anyone has any answers that might be beneficial or needs anymore information that might narrow down the problem i would be very grateful. You can reach me at [email protected] (by the way it is a 1967 coupe with pretty much all stock parts)

Thanks,

isfn13

 

[2nd Mustang]

Get Car Craft magazine, January 2005 issue. It has a detailed article about finding that electrical gremlin.

 

[WORTH]

I have recently rebuilt my 289 small block and it has run fine except for the last few months. Somehow I have a ground in the system that is not allowing the battery to charge fully. I have replaced my alternator, voltage regulator, and tested my battery none of the above is the problem. If anyone has any answers that might be beneficial or needs anymore information that might narrow down the problem i would be very grateful. You can reach me at [email protected] (by the way it is a 1967 coupe with pretty much all stock parts)

Thanks,

isfn13

what is your actual problem with the system?
battery wont charge?
battery goes dead?
cranks slow?

 

[Pakrat]

Get the right tools for the right job regardless of the particular problem. Instead of buying and replacing parts, spend a few dollars on a decent multi tester that will allow you to isolate the bad area. It will also come in handy for adjusting points dwell and monitoring rpms when adjusting the timing amongst various other common and frquent maintanence issues.

 

[2nd Mustang]

If/when you get a voltmeter, take the advice of the Car Craft article and get one that has a 10 amp capacity reading with a replaceable fuse. A digital model is the best as a few tenths of a volt could make a difference in trouble shooting. The other possibility is that the battery cables could be bad. Sometimes the cable could look good and have good continuity end to end but not enough capacity to carry the full amperage. Sometimes you can tell if the cable gets hot to the touch when the alternator is trying to charge the battery, but becareful, if the cable is leaking, you'll get a serious injury, don't ground yourself to the car.

 

[krash kendall]

Here's a link to some wiring diagrams that may help you. I printed off all the ones applicable to my car and added them to a reference binder I've been making up.

Diagrams 1964 1/2 - 1967