Vintage Mustang Forums banner
1 - 2 of 2 Posts

·
Registered
Joined
·
6,782 Posts
Discussion Starter · #1 ·
I have a PowerMaster 140 amp one-wire alternator. Prior to me taking down the car, my alternator lamp would come on dimly. If I increased the engine RPMs, it would fade out. However, with additional loads, it would be brighter. Anyhow, magically (*G*) the problem was still there when I got the car back together. Last evening, I removed the alternator and disassembled it. Time for some serious surfing. Found out that the diode Trio was bad on one leg. I also repacked the rear bearing (needle style). I picked up a new diode trio (0.98, literally) a spare and a new regulator as well as a spare rear bearing, for a whopping $14.94. By the way, I got a self-exciting (I am not going there) regulator. It does not need a 12 volt source on the lamp terminal to operate.

Anyhow, I will know tonight if my repair fixed my alternator lamp and got rid of the whine on the radio. All symptoms point to that $0.98 diode trio (also verified with the service technician at the auto electric shop).


Steve Leslie, 65 coupe in restoration. 302, toploader, A/C, disc brakes, bench seat

http://albums.photopoint.com/j/View?u=1571478&a=12535662&p=46267978&Sequence=1.jpg
 

·
Registered
Joined
·
6,782 Posts
Discussion Starter · #3 ·
Absolutely no idea. I spoke with the technician at the parts place where I picked up the parts and he stated that some of the diode trios are junk. Well, since I am an electronics engineer, I laughed when the counter guy came walking up with the parts in his hand. No static safe bag! Here at my place of employment, we are taught that handling electronics (even diodes) can cause latent defects that shorten the life of a component. I was going to say something to him but that is why I bought two fo them. I will throw one of them in a static bag and store it in the glovebox with the fuses.


Steve Leslie, 65 coupe in restoration. 302, toploader, A/C, disc brakes, bench seat

http://albums.photopoint.com/j/View?u=1571478&a=12535662&p=46267978&Sequence=1.jpg
 
1 - 2 of 2 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top