So it must be either a break in the wire, or a problem with the brushes/voltage regulator. Removed dash and dials to check the bulb continuity, all ok I revved it to about 5000rpm and then alternator was giving 14-14.5v, so it seems good also.Ĭhanged the battery to rule it out (was an old one anyway) Since changing to a new battery I can still start the car and it will run fine, but voltmeter only displaying battery voltage. The next day, the light was out, so I continued driving, resulting in the above problem, but with no warning. One daylast week it slowly lit up fully, so I drove back home. Previous to this I have been having a very very dim charge light illuminated on the dash occasionally, made worse when the blowers, lights etc were on. What's happening for me is the alternator isn't exciting, therefore not charging the battery, but there is NO battery charge light illuminated at all, even with ignition on and engine off, hence me driving around til the headlamps got dim and the car cut out (luckily it lasted exactly long enough for me to get home).Ī bit of research tells me that the exciter wire (little browny yellow connection on alternator) runs through the dashboard via the battery light bulb and onto the battery, to register some kind of current consumption that tells the alternator it needs to start charging. It's funny that this thread got bumped because I'm having a very similar problem. Not sure why you have three connections as the alternator earths through the case iirc I've connected the big wire (battery pos) to the big ring on the alternator and changed the spade connector (7a brown) to a ring one and connected it to the small connection on the alternator Yeah i have the same problem as the brown (7a) had a spade connector on it and the alternator had a ring connector (must be a new alternator to what i took off the car ?) I currently have the red on the B+ and the brown on the B- with no connection to the spade, am I understanding from this thread that the red to the B+ is right but the brown needs to have a spade connector on it? As the old alternator was different I cannot go by the connections on the wires so which two connections to these wires go to? I took two wires off the old (306/405/etc.) alternator, one red which connects to the +ve on the battery and one brown which I assumed to be to earth or something but know know to be to the multiplug. There's 3 terminals on the back of the alternator, one marked B+ (Which I assumed was battery +ve), one marked B- (similar assumption made but -ve!) and a male spade connector that is unmarked. Ok, just fitted my new/recon standard 205 gti alternator and having a similar confusion.
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