Question about 2000 Ford F350 Super Duty Super Cab

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Truck will not turn over but when batteries are tested wtith meter both are reading 24 v

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Double check readings/connections. The F350 was rarely built with a 24VDC electrical system. If it is hooked up wrong, you might have a few blown fuses. Assuming it is a diesel, the two batteries should still only produce 12 VDC

Posted on Aug 06, 2008


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My 2012 chevy colorado won't turn over.. when I turn the key on none of the dash lights light up either

Hi Kacey,

I imagine you've already tested your battery. If your put a multi-meter on the battery terminals, you should get 13+ volts. If not, then your battery is too weak to turn over the engine, and perhaps if too weak to power up the dash lights. If this is re-occuring, then you'll want to test your alternator to ensure it is producing enough power to recharge the battery. If the alternator is working, then you need to test for parasitic draw (aka an electrical short). You can test for this by putting your multi-meter between your negative battery lead and the battery terminal to measure draw. I don't know how much is too much, but I think it should be less than 1/4 volt. Then, one by one, pull/place fuses --- where you see the meter reading drop, that will likely be the vehicle component with the short.

Good luck.

Mar 10, 2015 | Cars & Trucks

1 Answer

How do I test engine computer control for 1993 dodge intrepid 3.3L 40 pin to check diodes. like to see a chart or diagram.

This type of parasitic draw can be tricky to find.Hopefully this will help you. I am a master tech and the electronics specialist where I work.This is how i would approach this problem.
Turn the car and ignition off.put your meter on current setting 10amps DC..and .put it in SERIES with negative ground cable. polarity of the meter leads does not really matter like with measuring voltage.The meter should read about 200ma of current with the car shut off.,once the interior lights go out...before that it will show a couple amps..Then leave the meter hooked up and about 20 minutes later,the body control module puts the car in "sleep" mode and current should be around 2ma.. (.002amps) This is normal PCM current drain. If the current is higher than this,pull fuses out one at a time until the drain goes away.this is the problem damaged circuit. Most meters have an auto shutoff function for the display to save battery life. if the meter shuts off before the 20 minutes is up,,just turn it back on ,DO NOT disconnect the meter as the 20 minutes will have to start over.
Testing diodes is simple. with the meter on diode check,there should be a .7 volt drop one way and infinite the other.
A shorted diode will read 0 volt drop in both direction because it is shorted.
An open diode will read open in both directions.

Sep 20, 2014 | 1993 Dodge Intrepid

1 Answer

Hard to turn over like weak battery?????

Clean battery terminals. Then buy a cheap tester that plugs into cig lighter about 5 dollars The battery should be about 12.6 volts just sitting. Start car and meter should read 13.8 or above if not replace alternator if it reads good and the battery is charged up turn off car turn on headlight for 2 seconds turn off and read meter it should read 12.6 if not replace battery or have it tested for free at autoparts store. If they load test battery and say it is good and the charging system shows good then your starter is drawing to much power remove starter have it tested for free at auto parts store. If they say you need a rebuilt have them test it before you take it home

Mar 03, 2013 | 2003 Chrysler 300M

1 Answer

Battery drains while sitting

Hi Anonymous, perform the following tests:
1. Fill acid type batteries to proper levels.
2. Charge battery overnight at 1-2 amps you need 12.5 volts or better after charging.
3. Hook up battery positive cable, then with your multimeter on the milliamp scale connect one lead to the negative battery post and the other lead to the ground cable. Meter should read 3 milliamps or less, 10 milliamps with a radio, 15 milliamps with radio and CB. If your meter reads higher you need to isolate the circuit by pulling fuses and circuit breakers one at a time and observe meter for drop in aprerage then get out your test light and track down the short in that circuit.
3. Make sure all connections are clean and tight especially the negative cable at "BOTH" ends.
4. Hook up volt meter to battery and start engine, if meter falls below 9.5 v while cranking replace battery.
5. With engine running at 3600 RPM battery should read 14.3-14.7 volts if not continue tests.
6. Unplug voltage regulator from alternator at crankcase by front of primary cover.
7. To test voltage regulator go to:
8. With ohm meter, one lead grounded, touch alternator pin meter should read infinity, if not replace stator.
9. With ohm meter, both leads touching alternator pins meter should read 0.1 to 0.2 ohms on 1989 and later models. 0.2 to 0.4 ohms 1988 and earlier models, if not replace stator.
10. With volt meter set on AC scale, both leads touching alternator pins meter should read
16 to 20 volts AC for every 1000 RPM'S 1989 and later and 19 to 26 volts AC for every 1000 RPMS. If not replace rotor.
17. For a free wiring diagram please visit the website below. Good luck and have nice day.
Harley Davidson Wiring Diagrams and Schematics

Jul 06, 2012 | Cars & Trucks

1 Answer

05 3.8 Van will not start. When turning the key over the engine turns very slowly. I took the belt off and checked it and it still turns very slow. Its making a clicking sound like a dead battery while...

Hello! If you have a multimeter and a little experience using it, here is a simple test...It sounds like there is a resistive connection to the starter motor...Set your meter to its lowest ohm scale (X1) as an example...touch both meter probes together and zero the meter...Place one probe on the Center of the - battery post and the other directly on bare metal of the starter motor...You must read zero ohms...If you do not read zero the negative battery lead is not making a clean and solid connection...Set the meter to read +12 volts DC...Take a reading across the battery terminals with key off...Then angle the meter so you can see it and turn the key to start...Record the reading...Send a comment with results.....Guru.....Saailer

Sep 07, 2011 | 2005 Dodge Caravan

1 Answer

Starter problems for 88 ford aerostar van 7 passenger. how do i know its the starter or bad connection?

Test your battery and starter by doing a voltage drop test. Put one test lead of your meter on the neg side of your battery, one on the positive. Check voltage. Make sure that you are actually connecting to the battery itself and not the terminal ends. Should read 12.8-13.2. Keeping the neg in the same location move the pos to the terminal end, engage starter, meter should read above 10 volts. Continue testing down the pos wire to the starter, checking voltage, until you find less than 10 volts. If the voltage is good at starter, have someone turn key to the start position, tap starter with a hammer. if starter engages , replace starter.

Aug 19, 2011 | 1988 Ford Aerostar

1 Answer

The battery and altenator are both new and tested good but the battery will not charge all wires are hooked up and seem to be in good condition

Hello! If you have a voltmeter, set it to read 12 volts...With engine off read across the battery terminals...Record the reading...Start the engine...Take the same reading...Voltage must be at least 1.8 volts higher...If not, The alternator isn't providing a charge...Next, turn off engine...Set meter to its lowest scale...Connect + probe to + battery post...Connect - probe to the + (Black/Gray or Black wire) battery lead on the alternator...Start the engine...Turn on heater fan and headlights...Meter must read less then .03 volts...Move the + meter probe to the - battery post...The - probe to bare metal on the engine block...Must read less then .06 volts...If either reading is above the given limits the problem is resistive/corroded battery cables which are dropping voltage...Remove and replace cables... Clean battery post and make sure the other ends are on bare metal...Guru...Saailer

Mar 04, 2011 | 1998 Dodge Ram 1500 4WD

1 Answer

When key is turned starter clicks and will not turn over, new starter, soloniod, ignition relay, worked for a few days and today click again, also new battery, it can be push started and will run

Hello! Either the positive battery connection or the ground connection is resistive (dropping voltage across the cables)...The ground connection being most suspect...If you have a digital multimeter and a wee bit of experience using one these connections can be tested...Set the meter to the lowest dc voltage scale...Place the + probe of the meter on the center of the + battery terminal...The - probe on the other end of the cable at the starter...You must read less than .03 volts...Next, place + probe on the - battery post and the - probe on bare metal of the starter case...You must read less than .05 volts,,,If not the connections need to be removed and cleaned so bare metal touches bare metal...A quick test with meter set on the X10 ohm scale is to measure between the center of the - battery terminal to both chassis and engine block...Both should read a dead short ohms...Guru...saailer

Dec 07, 2010 | 2001 Chrysler PT Cruiser

2 Answers

My car dont star, i check my ligths and averything is ok, i listen under de motor a little click click i hit in the starter whit a screw

If ur getting a clicking noise when u attempt to start it sounds like the starter drive ingaging into the flywheel but the starter isn't turning. Check ur battery to make sure it is fully charged and get a load test to make sure it is ok. Next check the connettions to the battery. Ur Problem wasn't complete--if crossing terminals at the starter the engine turns over it is the starter soloid, if it just clicks it is the battery or connections

Aug 03, 2009 | Nissan Pathfinder Cars & Trucks

1 Answer

24 volt charging problems .2 12 volt batteries 1 battery 16volts and the other about 9-10 volts

A 12 volt battery is actually 13.2 volts fully charged. If you are reading 16 volts, you are probably getting extranious voltage from the system somewhere, especially if the vehicle is running when you check the voltage. The alternator will put out about 15-18 volts to charge the battery normally, and yours may put out 28-32 volts to charge them in series, but the batteries, when disconnected, should never read more than about 13.2 volts each. Typically, it will read about 12 1/2 volts when disconnected. COMPLETELY DISCONNECT BOTH OF THE BATTERIES. If you still read 16 volts when it is disconnected, you must have a bad meter because the battery can't produce that much voltage, no matter what. (Six 2.2 volt cells connected in series inside the case.) Put the meter on a known good battery on another car that is not running and see if you get the same reading. It sounds like the other battery is almost dead, regardless, and it sounds like your series/parallel switch may be malfunctioning. (That is the switch that puts the battery in series to run the 24 volt starter, then puts the batteries in parallel to run the remainder of the vehicle on 12 volts. This is all assuming that you have a diesel vehicle with a 24 volt starter and that is why you have two batteries.

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