Registry of Ex Military Land Rovers

REMLR Technical => Electrical => Topic started by: Swoledad on July 14, 2020, 02:10:05 PM

Title: Alternator excitement
Post by: Swoledad on July 14, 2020, 02:10:05 PM

I have a curious issue with my alternator I am yet to solve. Hoping you guys can give me some clues of things to look at.

Every time I start my 1988 FFR, the battery light remains on. Voltage is 12.6, a good indicator that the alternator is not charging. If disconnect the 3 pin plug On the rear of the alternator and re attach, the alternator kicks in and voltage jumps to 14.4

I thought it might be dodgy connectors on the plug, so I put new spades on.
Issue still remains.

Any ideas?

Title: Re: Alternator excitement
Post by: Swoledad on July 24, 2020, 05:53:04 PM

Bump.
Anyone got any ideas? I just can’t work it out.

I found if I short the IG pin to the L pin momentarily (feeding 12v into the lamp relay circuit), the alternator excites and then runs fine until I need to shut the engine down and restart it.

Title: Re: Alternator excitement
Post by: BEARMAN on July 24, 2020, 07:54:33 PM

Sounds like you have have a dodgy connection or a broken wire at the plastic plug.

Title: Re: Alternator excitement
Post by: Carzee on July 27, 2020, 03:16:44 PM

A helpful video came out just today, on a Defender alternator, which looks similar to the Hitachi one in Perenties, goes well through the "excitement" etc ---- very informative in general.

https://www.youtube.com/watch?v=FQHPwd4YmPU