[Tigers] Electrical Issue

[Ron Fraser]

Jim
    I'm not the electrical guy but I had numerous problems with my generator
system until I converted to Alternator.
 
G post- ground - black wire
 
F post - wire NG is the field
 
A post on rear cover - wire NY is generator output - should be in the 14 to
15v range
 
1st - give the generator a medium smack with a hammer - if 14v or more shows
up - time to rebuild the generator - the brushes are worn and hanging up
It is my understanding that generators need to be rebuilt every 30 to 40K
miles.
 
I had to run my generator system with the VR cover off - I believe it was
too heat sensitive - with the cover always off I could easily clear the VR
points when I lost voltage.
 
I installed a volt meter under the dash so I always knew when the generator
was not working properly.
 
Hope that helps
 
Ron Fraser

-----Original Message-----
From: Tigers [mailto:tigers-bounces at autox.team.net] On Behalf Of James
Lindner via Tigers
Sent: Friday, April 10, 2015 8:37 PM
To: Tiger List
Subject: [Tigers] Electrical Issue


Hi All

I was getting my Tiger ready for the season and I noticed that I was not
getting a charge at idle. The more the car warmed up, the more rpms it
needed to keep the ignition lite off. Over the years I have experienced
problems keeping a voltage regulator for any great length of time. They just
seem to give up after not so long. This time I did pretty well.it lasted
over a year. I checked the battery and generator just to be sure.the battery
had a full charge and the generator was generating.

So I switched out the v/reg for one I purchased from SS as a backup last
year. I have done this installation a couple of times so I was confident,
even with my minimal skills.

I got the new v/reg in. Reconnected the battery but When I went to polarize
it (touch F wire and B wire momentarily per Shop Manual).nothing. I checked
my connections (Brown to Batt terminal.Brn/Grn to Fld terminal.Brn/Yel to
Arm terminal) all were correct. I double checked battery.full charge.

Thinking the v/reg might be bad, I reinstalled the old one.same
results.nothing.

I installed new one again.same results.

The only other action I took was to disconnect the terminals on the
generator and cleaned them up. I checked to make sure I reconnected them
correctly.

I took a chance and turned on the ignition.dead.

After taking a break I went back out and did some more inspection and
testing. Not sure if it made a difference but I found the battery wire
(brown) spade connector at the fuse box loose. I crimped it down and got a
much tighter fit. The v/reg still would not polarize so I then took some
readings with my multimeter. Here are the readings.

 

Battery.....................12.9v

Batt Term @ V/reg................12.9v

Battery term @ solenoid.............12.9V

Battery Term @ Gen (end of case)......0

 

I thought I should get a similar 12 something reading at the Batt terminal
on the generator. Any advice on where to make additional tests or anything
else is appreciated. 

 

I am pretty much a neophyte at this so please type slowly.

 

Thanks

 

Jim Lindner

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