[Tigers] Electrical Issue

Wed Apr 15 08:24:41 MDT 2015

I’ll second that. A misspent youth riding Brit bikes proved early on that bad grounds cause all sorts of voodoo. I like to run an extra ground somewhere from the engine to the chassis. Also the battery is grounded to the chassis with a bolt-through, and corrosion loves to find its way inside there, clean it regularly.

Bugz

From: Tigers [mailto:tigers-bounces at autox.team.net] On Behalf Of CoolVT--- via Tigers
Sent: Tuesday, April 14, 2015 8:16 PM
To: jliny5 at cox.net; tigers at autox.team.net
Subject: Re: [Tigers] Electrical Issue

Jim,

People have found out that if the ground wire from engine to chassis is not clean and tight that all kinds of problems crop up.  If you haven't checked that I would suggest that as one of your steps.

Mark

In a message dated 4/14/2015 7:46:17 P.M. Eastern Daylight Time, tigers at autox.team.net writes:

Hi Listers,

Thank you all for your feedback. I thought I would give an update. It seems I have 2 problems. Everything went dead because it seems I have a loose connection somewhere along the battery wire (brown) to the V/R. I suspect my ammeter and the wiring for it have something to do with that. 

The bigger problem is that my car is still NOT charging. This was my original problem and the reason I replaced the V/R in the first place. Now my ignition warning light is on full time. Many of you felt it was the generator, at least one believed it is a fault in the wiring. I too believed it was a generator problem. So today I removed the generator and took it to be rebuilt. I asked if we could bench test it before going through the effort/cost of rebuilding. They hooked up the generator and it tested out fine. We then added in the new and old V/Rs to the test. With the new V/R hooked up with the generator, it tested out at 12.7v...a little anemic. But with the old V/R connected (which I had just replaced), the test showed the generator putting out a solid 14.5v (+/- a tenth or so).

Bottomline...generator and V/R tested out fine. So it’s onto the wiring..

Again, thanks for all the input and given the updated info we are still open to any ideas.

Jim

From: James Lindner <mailto:jliny5 at cox.net>  

Sent: Friday, April 10, 2015 8:37 PM

To: Tiger List <mailto:tigers at autox.team.net>  

Subject: 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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