230 Mike wrote:
Can you describe how you tested the new batts and how you've verified the alternator output? How are all the connections - clean, tight, corrosion-free?
On the speedo, what type of pickup do you have? If it's a pitot tube, most likely the pickup itself is clogged (common), the tube between the pickup and speedo is loose on one of the fittings or has developed a pinhole or crack, or, the speedo itself isn't working right. If you have a paddle wheel pickup, the wheel probably needs replaced.
I replaced the alternator, and both batteries are brand new. I also used my battery tester on both batteries as well as using it on the alternator while running. All tested good. All the connections are clean as I just replaced the battery terminals and cables when I installed my battery switch. So I'm starting to believe that it has something to do with the infamous gauge cluster, just curious if anyone else has had this issue before.
I have the paddle wheel pickup, so I guess I will add that to the list of stuff I will replace when I have the time and the money.