Can’t help you with the rattle. Could be a bad connector or broken wire. They might have a repair kit connector for that.
if you are PHYSICALLY touching it and something happens then you have a PHYSICAL issue, in this case most likely a wiring issue.I have a few questions about this alternator problem. If the volt meter gauge is running low, how come when I put the hand held meter on the battery the gauge goes to 13 volts? If the wire is broken, how come when I pull it towards the passenger side the gauge goes back to 13 volts?
Take a look at the positive cable on the battery. There is a smaller pigtail coming off of it that leads to the back of the alternator. If the cable has ever been changed there may be a (suspect) crimp connector there hooked to the wire going to the back of the alt. I think perhaps there would have been a fusible link there as OE, and the OE wire would have a softer feel and covering than a replacement pigtail wire. Charge returns from alt to batt + through this wire/pigtail. It will cause the gauge to drop in the dash if there is any poor connection between back of alt and batt +. Battery is just part of the load with engine running after all. Fought and cursed to change an alt on mine in my dark driveway one night when I was doing the clean and prep to go of to a show next morning because I noticed the low voltage on the gauge. Not an easy thing with that seriously long bolt to get through the ferrule that bolts on the back of the alt though to get it all lined up reaching between fan blades and still have to get that bracket for the smog pump slipped behind all that before tightening to the block. Anyway I found that the aforementioned crimp connector was actually the issue. Gauge still read low with new alt. Re crimp connecter all was good. Still good today, several years later. Wish I was proficient in making solder connections. I check it regularly instead.I appreciate your help. I'm just not understanding. How does touching the battery with a hand held meter make the gauge go up to 13 volts? How does that control the wires going into the car?
"So how does holding a hand held meter connected to the battery make the voltage gauge in the car go from 8 volts to 13 volts"View attachment 141891
View attachment 141892 View attachment 141893
The first picture shows the battery ground cable attached to the fender. The second picture shows the ground cable attached to the alternator bracket. The third picture shows the positive cable going down towards the starter. The little wire with the boot on it connects to the alternator.goes in conduit with the activity wires going back towards the firewall and starter. So how does holding a hand held meter connected to the battery make the voltage gauge in the car go from 8 volts to 13 volts?