Mach1 Driver 597 Report post Posted October 6 We have seen many versions of how to do this over the years. I have compiled as much of that information into one document as possible, covering 1965-70. Every year except 66 has two types of charging systems; one with an ammeter, and one with an alternator charging light. The 66 only has an ammeter. In this document there are two charging system wire diagrams for every type; the first diagram shows the stock wiring with a 1G alternator. The second diagram shows the 3G alternator and the new wiring. This way you can compare the two and make sure you get it right. Most forums don't allow uploading of large files, so I parked several useful documents on Google Drive. Using the link below, you have free access to all the documents in this directory: https://drive.google.com/drive/folders/10FqYlsGT1XXr8B5TCF9WAASkU4vdPtuJ?usp=sharing Look for “3G Alternator swap onto a classic Mustang” The document is 18 pages, and I would have included the “Contents” page below IF PICTURES WORKED. 2 1 RPM, bigmal and rwcstang reacted to this Quote Share this post Link to post Share on other sites
RPM 1,248 Report post Posted October 6 Thanks brother. Quote Share this post Link to post Share on other sites
Mach1 Driver 597 Report post Posted October 7 One of the guys on VMF (cougar70) says his car with 3G and alternator light has a very faint light when the key is on and the engine off. He wants it to be brighter. He didn't use the PA Performance converter, so he doesn't have the diodes, but I don't see how that would help. Has anyone else experienced this problem? I'm thinking that the old 15 ohm resistor and 1895 bulb combination aren't optimized for the 3Gs internal regulator. My car doesn't have the alternator light (its the ammeter version) so I haven't seen this problem and my car isn't an ideal candidate to experiment on...but that wouldn't stop me ;) Quote Share this post Link to post Share on other sites
