Trying to work out the wiring for my Lucas LRA00374 alternator, the rear view of which looks like this:
Happy enough with the 3 pin connector, which has the two larger spade terminals connected together internally. I assume I can connect my positive output from the alternator to either of these?
Also though, I can't work out what the connection with the nut on it directly under the 3-pin connector is for. There is no legend on the casing and I can't find anything on either this site or anywhere else on the Internet.
Anybody know what that's for?
Thanks
Phill
Lucas LRA00374 wiring
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Phill, Accordibg to the haynes car electrics manual that stud is a Pos that you don`t have or need to use. It has an insulator so it must be a positive.
The other connections are thus: the smaller of the three is from your ignition via the ignition light.
The other two are the positive, however though they are joined together inside both are used. The norm here is two cables are used instead of one very thick one. These two thinner cables are 4mm thick ( well mine was once ) not counting the insulation then both are connected together later. They are joined either in a connection box or soldered to a thicker cable that connect to your battery Pos sooner or later.
Lucas used this system so a very thick cable would not be needed. You could use one cable but you would need a thicker cable, the problem then is would one connection at the alternator be able to stand the current that may be drawn through it?
At the end of the day you don`t want cables getting even near hot.
Hope that helps.
Mike
The other connections are thus: the smaller of the three is from your ignition via the ignition light.
The other two are the positive, however though they are joined together inside both are used. The norm here is two cables are used instead of one very thick one. These two thinner cables are 4mm thick ( well mine was once ) not counting the insulation then both are connected together later. They are joined either in a connection box or soldered to a thicker cable that connect to your battery Pos sooner or later.
Lucas used this system so a very thick cable would not be needed. You could use one cable but you would need a thicker cable, the problem then is would one connection at the alternator be able to stand the current that may be drawn through it?
At the end of the day you don`t want cables getting even near hot.
Hope that helps.
Mike
Mike B Drives a 1984 Mk2 Granada ghia V8.