Topic Review (Newest First) |
09-12-2010 07:34 AM | |
pfhannan |
Re: Voltage Regulator on my 5.0? All is well now, I bought a new Alternator. Thanks for putting up with me. |
08-30-2010 03:53 PM | |
quick5pnt0 |
Re: Voltage Regulator on my 5.0? Definitely change the alternator first. Then to track down the draw you can usually disconnect the negative battery cable and place a test light between the battery terminal and cable. The light may turn on dimly or not at all, however If the it shines bright there something is drawing power that shouldn't. To find the problem the first thing you do is start pulling fuses and redoing the test. Once the light dims or goes out then you've found the circuit that has the draw. From there its just a matter of trying your best to track down the problem, such as if that circuit has the radio in it try disconnecting the radio and see if the light dims or goes out. BTW If you do a search on google for battery parasitic draw test you'll find a ton of information on finding the fault. There are also a bunch of videos on youtube on the subject. |
08-29-2010 09:39 PM | |
87hybrid |
Re: Voltage Regulator on my 5.0? Electrical gremlins are the worst. The brake lights and cruise could be coincidental. But change the alternator and hope all i well.. |
08-27-2010 12:07 PM | |
pfhannan |
Re: Voltage Regulator on my 5.0? Just to be sure, I had the diagnostic test done this morning at AdvanceAutoParts, and TireKingdom, both results said the Altenator, but one test at AdvanceAutoParts had a drain test, and the results were 3.19A "Suspect" I will go out and buy a new Alternator this week. If 3.19A "Suspect" is still there after replacing the Alternator, then there are other issues. (1) 4 weeks ago my cruise control would not cut off when braking, only when hit off button. (2) my brake lights burned out Any thoughts? Paul |
08-26-2010 10:56 PM | |
quick5pnt0 |
Re: Voltage Regulator on my 5.0? Technically it could be a wiring problem but yes most likely that is the alternator. Have had the exact same problem twice on the fox body I used to own. |
08-26-2010 10:32 AM | |
pfhannan |
Re: Voltage Regulator on my 5.0? I have bought a new battery, and replaced the battery cables. Now still have a problem, 2 days lated battery was dead. I did some tests with the meter, and let me know what you think; At an idle with headlights on high my reading was 12.37, i then turned the A/C on high and my reading was 12.21. I stuck the accelerator to do 3000 rpms, and got a reading of 12.27 I did read that the Battery voltage Should read between about 13.8 to 14.2 volts. (Possibly up to 14.5 Volts., if thats the case then would you say change the alternator? |
08-20-2010 12:17 PM | |
quick5pnt0 |
Re: Voltage Regulator on my 5.0? Glad to hear you found the problem! |
08-18-2010 06:39 AM | |
pfhannan |
Re: Voltage Regulator on my 5.0? You are right, the battery is toast... even though the cells registered well, under a load the voltage dropes big time, thanks for all you do to help us. Paul |
08-18-2010 12:21 AM | |
quick5pnt0 |
Re: Voltage Regulator on my 5.0? I'm having a hard time visualizing how the solenoid is set up on the Mustang. I believe there is a positive cable going from the battery to the solenoid, and then another from the solenoid to the starter. If the engine wont crank and you jump the two cables together at the solenoid you will be bypassing the solenoid completely and the car should crank. If its cranks then you know the solenoid is toast. However, with the voltage readings you're getting (especially that first one) it sounds like there is either a problem with the battery or the cable. You're getting only 6 volts where there should be 12. If you check the voltage across the battery terminals is it 12+ volts? If so then try connecting the negative lead (of the voltmeter) to the negative battery terminal and the positive lead to the positive cable on the solenoid. It should still read the same voltage as before (12+ volts). If not then it would mean the problem is in that positive cable. Also next time it wont start try cranking it and then immediately check the battery voltage. If its below 12v then the battery is toast. |
08-17-2010 07:52 AM | |
pfhannan |
Re: Voltage Regulator on my 5.0? Using a soloinoid testing chart, with my meter I went through all the following stems, please have patience with me for this detail; Step 1: Check the voltage on the battery side of the solenoid as shown on the left. The reading should be the same as the battery reading (12.6V = Full Charged Battery). My Reading is 6.14 Step 2: With the voltmeter still connected, turn the key to the start position and read the voltage.The voltage should not drop below 10.0 volts on this terminal. If the voltage drops below 10.0 volts, The battery cable should be cleaned or replaced If the reading is 10.0 volts or more. My Reading is 5.73 Step 3: Keep the negative voltmeter lead on the metalbase of the solenoid and move the positive voltmeter lead to the terminal marked “S” on the solenoid. Turn the key to the start position and read the voltage. The Voltage could read a little lower than the previous reading but should never be below 10.0 volts. If the voltage is lower than 10.0 volts, You must troubleshoot the start circuit (ignition switch, voltage supply to the ignition switch, neutral safety switch). My Reading is .006 Step 4: Move the positive voltmeter lead to the battery terminal on the solenoid and the negative voltmeter lead to the terminal that the starter cable is attached. Turn the key to the start position and read the voltage. The voltage should read no more than .3 volts. If the reading is more than .3 volts the contacts have excessive resistance and the solenoid should be replaced. My Reading is 5.75 Step 5: Some solenoids use a relay terminal on the solenoid to power fuel pumps or supply full battery voltage to ignition coils when the starter is activated. This terminal is usually marked “I” or “R”. Connect the voltmeter a shown. Turn the key to the start position. You should read no more than 0.3 volts. If you have more than 0.3 volts the solenoid should be replaced. I can’t see where the terminal was, is there an ignition coil? So what do you think...is it my Solonoid? |
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