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Battery pack voltage out of range

Getting code b1676. Replaced alternator with an aftermarket one, but voltage checks out to be good. Is the cars PCM not getting proper communication with the new alternator.

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Posted on Jan 02, 2017

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SOURCE: alternator light on

The alternator is not producing any power . If it were the engine would run without the battery. Check the wiring on the alternator. It must ave an exciter wire to make it work.

Posted on Oct 07, 2008

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SOURCE: Charging Light On After Replacing Alternator/Battery1999Windstar

Hi, I can't tell you exactly what is wrong because there is too much involved at this point, what with 2 shops working with it, but I can give you some advise on what else to check. On the alternators and the wiring that supports them a small volt charge is taken off one of the slip rings, where the brushes ride, for the purpose of turning out the light. As I remember, this is a yellow wire that runs back to the dash.

To the alternator, it would be one of the wires that plug into the side of the alternator case.

Posted on Nov 27, 2008

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SOURCE: 2003 focus electrical issue- not charging properly

If you replaced the alternator and you have checked all fushes and wires. you most likly recieved bad alt. I would take it off and have it tested.

Posted on Jun 02, 2009

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SOURCE: replaced the battery and the alternator in 2006 ford taurus

check the alternator fuse and grounding

Posted on Sep 25, 2009

  • 532 Answers

SOURCE: 1999 Ford Expedition - fuel pump not working after replaced alter

replace the fuel pump

Posted on Nov 15, 2009

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Alternator went out, truck died, Towed on hauler. Replaced alternator and now gages go crazy Codes are B1676, C1226, P0460 and P1000 I read if its driven the syst1em will reset itself. Is this true?

If the battery voltage is low it will set codes that are not prudent. It is not a good idea to charge a dead battery with the alternator as it causes the alternator to run at high amperage.Charge the battery, clear codes and retry

Apr 11, 2015 | Ford F-150 Cars & Trucks

1 Answer


Likely you are draining the battery with your system use during the car operating. This drag down of the battery means that your alternator may not be working properly. Check the alternator to see if it is putting out voltage. Otherwise check the battery during operation to see a higher voltage on the terminals if it is getting charge from the alternator.

Feb 01, 2015 | 1994 Honda Accord

1 Answer

Codes forp155 and102

1. Check the voltage output of the MAF sensor by measuring voltage on the Light Blue/Red (LB/R) wire with a Digital Volt-Ohm Meter (DVOM). A typical idle reading will show 0.7-1.1 volts at idle and the voltage should respond quickly and rise to above 3.0 volts during a snap acceleration of the throttle.

2. If the MAF voltage is out of range and/or it does not react during the snap acceleration of the throttle, replace it.

3. Check the Brown/White (BR/WH) wire of the Throttle Position (TP) sensor for a steady reading of 4.9-5.1 volts. If the voltage is out of range, verify PCM power and grounds are good before replacing the PCM.

4. Unplug the voltage regulator at the alternator and recheck the engine running condition and values as previously noted through the scan tool. If the engine runs better with more realistic pulse width values and good fuel trim functions when the voltage regulator is disconnected, replace the alternator assembly.

5. Wet down the ignition wires and coil pack and look for possible signs of electrical arcing that may be spiking the PCM and engine control components with electrical noise.

6. Inspect all battery cable connections including the connection to the fuse box, engine, block and body grounds near the battery. Address as needed.

7. Check the vehicle's fuel supply for a quality issue which could influence the engine operation because of excess alcohol, the presence of diesel, or any other contaminant. Drain the tank and flush the system as needed.

Apr 14, 2014 | 1995 Ford Thunderbird

1 Answer

Voltage on both leads to IAT connector

12-13.5 V sounds a bit low. Have you checked the alternator? Is there a difference in the voltage when the motor is running (should be higher when the motor/alternator works)? Have you checked the consumption when the car is parked?

Jan 20, 2014 | 2002 Audi A4

2 Answers

2000 ford expedition I changed plugs pcv egr valve cover gasket I am still getting power loss and hesitation in drive and sometimes it stalls plus I have a b1676 code

There is no B1676 DTC. You probably mean P1676 which refers to incompatible injector data. Probable causes are:
1. Control unit software needs updating
2. Faulty PCM or ECM

Checking these two probable causes may get performance back to normal.

Jan 16, 2014 | Cars & Trucks

1 Answer

B1676 - how do you reset this code?

check connections and look for a failed fuseable link wire..

Dec 27, 2013 | 2004 Mercury Sable

2 Answers

I have a 2002 ford taurus SE, coil pack has been replaced because Advanced Auto ran a diagnostic and said my coil pack was bad. Well its not and im still not getting fire on #3 and #4 spark plugs. changed...

You visually checked for spark and there was none? #3 and #4 show to be on same coil, each coil fires two plugs. Battery has a full charge? The red wire at coil pack is voltage, it has good voltage? Any applicable trouble codes?
The yellow wires with different tracer colors are grounds controlled by the pcm, one ground for each coil. Did you check voltage on ground wire engine cranking? I can't rule out a faulty coil driver in pcm. It's possible your old coil pack damaged the coil driver in pcm? If that is the problem, hope it didn't hurt the new coil pack.
ignition coil-rpv3jsqdi3m52f0zwyccrrib-3-0.jpg

Jul 10, 2017 | 2002 Ford Taurus

2 Answers

05 Ford Escape, coils #3 & #4 not firing. We've replaced the battery, spark plugs, alternator, coil packs, & pcm. Had pcm reflashed. Garage said it had to be coil packs, but just replaced coil packs 3

Check engine light on ? Code's ? What engine ? 2.3 l 4cylinder or 3.ol v-6 This vehicle has coil on plug ignition system , not coil packs ! a coil per cylinder . If new coils an still has no spark , has no B+ voltage to the coil or the PCM isn't controlling them . Without testing i'd only be guessing as to the problem .If the repair shop you had it to can only say it had to be the coils , I'd find another shop to take it to !
Autolite Coil on Plug Ignition troubleshooting

Jun 22, 2017 | Cars & Trucks

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Charging system shows to be working but light is still on


Aug 05, 2011 | 2005 Ford Taurus

2 Answers

Ignition coils burning up code p0352 misfire on #2 and 5 cylinder check eng light on replaced four coil packs now the van is dead.

Is it possible your alternator was putting out too much voltage? Did you check that when it was running? Looking at your diagram, the only causes I can see for this problem is excess voltage or failed PCM. You might consider taking the alternator off and have it checked; but, by the way, your PCM also controls the alternator stator voltage.

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Oct 29, 2010 | 1998 Plymouth Grand Voyager

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