The alternator on a 740T / B230 engine is getting weaker, slowly but surely. What to do?
Regulator/Brush Change. [Editor] You likely need either a new regulator (screwed into the back of the alternator) or new brushes on the existing regulator. Swapping regulators is easy. The regulator has attached to it a set of brushes that contact the commutator. To replace the brushes, you will need to solder the new ones in place according to the instructions below. Also: Often the failure of an alternator is the result of a blown diode or a worn out bearing, etc. These parts are not expensive and their replacement is not difficult with the right tools. ($300+ alternator replacement cost for a burned out $10.00 part, what a scam!) With a little looking, I found a shop in my area that repaired the alternators (new bearings, brushes, leads, whatever else was needed) for about $70. All I had to do was get the alternator out of the car and bring it to them. This may be a way to go for your car. Note: regulators and brushes may be replaced on both Bosch and Nipon-Denso alternators. Insert
