I have my car running on an adaptronic e420d and all seems well minus my charging system. My first new s5 alternator was overcharging so i put another fresh reman alt in and now its not charging. The alt is currently wired with terminal S going straight to terminal B (I read in other threads that was ok, now im questioning it.) Terminal L isnt currently connected but it will power the volt gauge in the dash.

So i guess my question is with S to B and L not currently connected, should my alt be working right now? Anything wrong with this wiring?

s4 chassis and battery in the rear.

 

L needs to be connected to a load for the alternator to charge. If it's not connected to anything, no charging.

I always use a light bulb. The OE system connects through the charge light in the dash. Never tried a voltage gauge but my WAG is that it won't work as a load to drive regulator.

 

^^^^x2^^^^

There needs to be a load, which the voltmeter won't provide. Unless, maybe with a really old school voltmeter.

Probably would be best to just wire it to the charge light like in the factory wiring, and tap your voltmeter to the alternator output.

 

Cool thank you guys, I guess I misunderstood the info I did find. I'll give it a try!

 

B: Battery output
S: Ignition Switch:
L: Load (Dash Light)
R: Regulator

For the same amount of work, why not go with a FD or Taurus Alt instead? One switched 12v wire, one Constant 12v wire and then the Output cable