Author Topic: Alternator excitement  (Read 221 times)

Offline Swoledad

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Alternator excitement
« 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?

Offline Swoledad

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Re: Alternator excitement
« Reply #1 on: July 24, 2020, 05:53:04 PM »
Bump.
Anyone got any ideas? I just canít 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.

Offline BEARMAN

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Re: Alternator excitement
« Reply #2 on: July 24, 2020, 07:54:33 PM »
Sounds like you have have a dodgy connection or a broken wire at the plastic plug.
09/1998 Perentie 6X6 ARN202516 - BRUTUS

Offline Carzee

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Re: Alternator excitement
« Reply #3 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