What could cause a 2006 Taurus alternator not charge the battery?
I replaced the power steering pulley recently. After this, the "Check charging system"
indicator came on.
- I checked the voltage, and it idles @ 11.8V
- Took battery to check, it checked out good, it takes a charge. Got it charged.
- Took alternator to check, it checked out good, it gives off 14V in store. They would
- Checked fuse @ breaker box. 10A fuse is OK.
- The return cable from fusebox to alternator has continuity.
- Both cables that go from alternator to PCM have continuity.
- Replaced PCM because it was suggested that since 2006 Taurus charging system
are controlled by PCM, it may not be telling the alternator to turn on.
So far, none of these option have worked. The battery still sits at 11.8V idle.
What else can I try or look into? I am out of ideas.
Just a thought but might want to check belt routing. Was belt but back on correctly? Is there plenty of tension on it?
If you have replaced all you say,there is a grounding issue,search for bad ground,start from motor block to frame.
Good call TST.
agree..... check your ground. One simple way to check. Connect black side of your jumper cable from the engine block to the neg side of battery. Then re-check your voltage output. It might be better to take a voltage reading above 1500 RPM too.
Thank you all for your suggestions. While checking for grounding issues, I found that the 175A fuse from the breaker box was burnt. No idea how, maybe alternator arced somehow. $5 fuse from auto parts store, and it was fixed. I feel bad now, that I have to return the PCM. Should have stuck to the basics. Thank you all for your suggestions and time!
Glad you got it going.
having the same problem,tried it all,belt,battery,alternater ,bleave its a fuse in the breaker box.
Check the "MegaFuse" mounted to the battery junction box. It has a red hotwire coming in from the battery and a black ground wire running to the alternator. I replaced 2 alternators before stumbling upon this.
Looking for a Used Taurus in your area?
CarGurus has 23,103 nationwide Taurus listings starting at $1,400.
Search Ford Taurus Questions
Ford Taurus Experts