[6pack] Alternator warning on, ignition off

[Bob Peglow]

Jumping in here.....
I repaired my Lucas alternator with this kit(diodes) if you need it.
https://www.ebay.com/itm/Alternator-Repair-Kit-Rectifier-Regulator-Brushes-LUCAS-15-16-17-18-ACR-/201952951074?vxp=mtr&hash=item2f05557b22
My alternator is the 3 pin-plug style.
Bob


On Fri, May 04, 2018 at 12:25 PM, John North via 6pack wrote:

Thanks for the help Bob.   I do have the correct lamp connected.   I am 
unable to pull off just the N/Y wire from the alternator, because both 
Brown wires and the Brown/Yellow wire are on a single plug that pushes 
into the alternator.   If I remove this connector then the warning lamp 
goes out, but I'm not sure this is definitive.   With the connector 
removed from  the alternator and 12v jumpered to the Brown/Yellow 
connector, then the warning lamp lights.   I have read over Dan Masters 
book, but I am not clear that the Brown/Yellow wire is live only with 
the alternator turning, ie the car running.   Is that the case?   If so, 
then, as you say, there's something amiss in the alternator.   Are the 
diodes replaceable or am I looking at a new alternator?


John North


On Tue, May 1, 2018 at 12:38 PM, Robert Lang <robertlangtr6 at yahoo.com 
<mailto:robertlangtr6 at yahoo.com> > wrote:

Hi John,
The first thing I'd do is check to make sure that the proper light is 
inserted in the correct hole. I have switched oil pressure and 
alternator lights around when in a hurry or not paying attention. The 
alternator light should have a brown / yellow wire coming from the 
alternator and a white wire going to the ignition switch. Try pulling 
the brown yellow wire from the alternator and see if the light goes out. 
If so, there may be a short in the alternator diodes. I have seen that 
happen plenty of times. If the ignition light does not go out when you 
pull that wire form the alternation, then you have somehow connected the 
ignition light to the wrong circuit and there's voltage present. Failing 
that, if you have a a test light - poke around to see what's going on, 
but the basic problem is that a brown wire in the circuit is connected 
to that ignition light and as you may know, the browns are hot all the 
time as well as un-fused, so be careful. The only other things that I 
can think of are related to hooking up the wrong lamp in the ignition 
hole in the tach, so make sure you're working on the proper circuit.

Good luck!

Bob Lang
















                         On Tuesday, May 1, 2018, 11:44:30 AM EDT, John 
North via 6pack <6pack at autox.team.net <mailto:6pack at autox.team.net> > 
wrote:












I have been replacing the dash support and in the course of that 
disconnected  overdrive and other wiring wiring, but now I put things 
back together, the alternator warning light is on even when the ignition 
is off, key removed.   Can't figure this out, anybody got ideas?

John North
1976 TR6


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