Have a Car Question? Ask a Mechanic Online.
John, Yes the red battery light does come on before I start the engine.
I have a greelee digital voltage meter.
Ok, at the moment I have the battery being recharged and disconected from the car. The volt meter has a Ohm setting.
Note this is all very difficult to see from under the car on my back,
The Alternator has a solid red wire that goes to the top of the starter and i am not sure but i think connects and goes up and thru the fire wall and into a fuse / relay box under the driver dash. There is also a small black wire that does the same thing from the alternator over to the starter. Top side there is a main black insulated wire with the positive battery connector on it coming from the starter and three red wires that attach to the end of the positive battery bolt coming from the fuse / relay box. Not sure which wire is the one you want me to check?
It's late, can we reboot this tomorrow eve when it will be light out and the battery is recharged to be able to start the car?
Here is what I found out tonight:
With Engine Off battery connected and ohm setting on meter at 200 the readings were as follows:
With the engine running:
Also I was able to determine that two of the three red wires attached to the nut on the clamp to the positive terminal were Ignition and fuel pump. The third I suspect is the alternator and I left it off for your test.
I also tightened up the pulley on the alternator it was more that 3/8" deflection ( may have not been tight enough and worked lose after yesterdays op)
The volt readings tonight were as follows:
No load, and car off:
No load, and the car running
Load (lights and AC on)
2003 Jetta left rear window blue plastic part of the