[hrocha35.hr]

Hello everyone. I'm in need of some help just figuring out if the problem I'm having with my 2008 Ford Mondeo MK4, 2.0, can be fixed by myself or if I have to take it to a professional mechanic. I'm not getting the car to start, loocking like it doesn't seem to have enough power to run the engine, just like if the battery is drained. The tests carried out on the battery indicate that it is 91% effective and with a load of 98%, so it is good. The tests I did, both to the solenoid and to the starter (with it disassembled), also did not indicate any failure. Whenever I do a jump start with other car and i have success and my Ford starts. Then i check that the alternator is charging my battery (14.5V) and after a few minutes, I turn off my car, measure the voltage of my battery, 12, 8/9V but I don't have the power o run the motor again! With the starter motor out i measure that i can have at least 10V getting to the the starter motor from the solenoid, but when its assembled on the car, i get only about 6V. Can anyone enlighten me what this problem can be? Tks a lot. Best regards.

 

[PURPLE_2L_LX]

Do this battery/alternator test... Battery/Alternator test...

Post the results for every step and let us know how/where you took the readings. Slight voltage variations
if read at the battery with a meter or internal power socket or dash voltage reading etc.

 

[HC56]

Hello everyone. I'm in need of some help just figuring out if the problem I'm having with my 2008 Ford Mondeo MK4, 2.0, can be fixed by myself or if I have to take it to a professional mechanic. I'm not getting the car to start, loocking like it doesn't seem to have enough power to run the engine, just like if the battery is drained. The tests carried out on the battery indicate that it is 91% effective and with a load of 98%, so it is good. The tests I did, both to the solenoid and to the starter (with it disassembled), also did not indicate any failure. Whenever I do a jump start with other car and i have success and my Ford starts. Then i check that the alternator is charging my battery (14.5V) and after a few minutes, I turn off my car, measure the voltage of my battery, 12, 8/9V but I don't have the power o run the motor again! With the starter motor out i measure that i can have at least 10V getting to the the starter motor from the solenoid, but when its assembled on the car, i get only about 6V. Can anyone enlighten me what this problem can be? Tks a lot. Best regards.

Purples test link is best practice..Dunno bout yours but mine (2.2) if battery drops below 10.8?? I think the ecu reads it as bad and no crank...nadda....If Your getting 6v either battery is toast or There’s something else going on...bad earth even?....Anyway, go with the tests purple knows best practice...Good Luck


Sent from my iPhone using Tapatalk

 

[hrocha35.hr]

The test to the batery was made in a local batery store with the right measuring tool. About the rest of the tests, i do it myself with a multímeter. But this evening, after work ill do it all over again and ill post the tests and results here. But Just to reply to HC56, after i charge my batery and reading 13.2V on it, o get the same result, No power. I already used a jump cable to reenforce the earth to the starter motor, and got the same result! This is frustrating.

 

[hrocha35.hr]

By the way, good morning and tanks for the reply... 😀

 

[PURPLE_2L_LX]

It will read high right after a run or charging with a battery charger but after a few hours it will settle back to
a more stable voltage. Thats why I put leave for several hours after charging before testing.

 

[hrocha35.hr]

Good point Purple. Today ill run a few more tests and leave my batery to charge. Tomorrow ill give it a test after unplug it from charging and make a measuring to check the values

 

[mike4369]

Test for a good earth at the starter -check that the earthing strap is not corroded - better still use a jump start lead to connect the starter to the chassis lug connedcted tomthe batt negative lead.

 

[hrocha35.hr]

I guys, sorry about not giving news but i had a crazy week at work and i always got late at home.
Today a made a small test to the starter motor and i find out that i have continuity between the 12V screw from battery on the solenoyde and the one that connects to the starter motor. This test was made with the battery disconnected. Do you guys think is normal? Tks

 

[hrocha35.hr]

FHD0038.MOV

drive.google.com

 

[hrocha35.hr]

Is just a video with my tests to the starter motor. Any help is appreciated.

 

[TheAntman]

Just a quick question for you.
You mention in your original post that if you jump start the car you have no problems getting it started.
I do know that these cars have been engineered in such a way as to prevent owners from jump starting incorrectly - i.e. connecting both terminals of the 'dead' battery to both terminals of the battery of the assisting vehicle.

This has got me thinking.
You've tested the voltage of your battery and suggest that all looks good, and you also state that you've had the battery tested and all OK.
We know your starter is ok, because it works fine when jump starting.

Have you checked that your negative battery terminal is firmly connected and that you have a good connection between that and the terminal post on the bulkhead?

I know this sounds like a really simple thing to think of, but often when diagnosing a fault, the simplest causes are often overlooked.

 

[TheAntman]

Just a quick question for you.
You mention in your original post that if you jump start the car you have no problems getting it started.
I do know that these cars have been engineered in such a way as to prevent owners from jump starting incorrectly - i.e. connecting both terminals of the 'dead' battery to both terminals of the battery of the assisting vehicle.

This has got me thinking.
You've tested the voltage of your battery and suggest that all looks good, and you also state that you've had the battery tested and all OK.
We know your starter is ok, because it works fine when jump starting.

Have you checked that your negative battery terminal is firmly connected and that you have a good connection between that and the terminal post on the bulkhead?

I know this sounds like a really simple thing to think of, but often when diagnosing a fault, the simplest causes are often overlooked.

Just to explain why I'm suggesting this, a couple of weeks ago, a chap who'd been doing some work across the road was having a terrible job trying to get his transit van started.
I observed 5 blokes standing around, looking under the bonnet, struggling with jump leads and all sorts, and they couldn't get it going.
I wandered over and asked if there was anything I could do to help.
First thing they said was they couldn't find a negative terminal.

OK, so connect to anything metal connected to the body.

I asked where the battery was - it's behind the drivers seat.

I took one look at it and solved their problem
The negative cable just lifted off the battery.

 

[hrocha35.hr]

hello,

thank you for your attention to this issue. At this point, I no longer know what to say, and i already tested it with a very good earth connectivity. This morning I tested the starter as you can see in the video through the link and I noticed that my starter is only receiving 6V from the solenoid! This situation had already been overcome but I had the same values again. At this point I'm leaning toward buying a nom starter. Also because, also this morning, still with the starter motor installed, I did some tests with the multimeter and I noticed that there was continuity between the terminal that receives 12V from the battery and the terminal that sends the current to the starter motor. This is not normal and is a sign that the solenoid mechanism that makes contact between these 2 terminals was malfunctioning. For all intents and purposes, I'm going to buy a starter motor and see if it turns out good!

 

[PURPLE_2L_LX]

Before you swap the starter do these battery tests that dont require the engine running and post the voltages
that your getting and let us know if your using a multimeter or other and where your getting the reading.

Voltages will vary eg. dash diagnostics will usually report a lower voltage.

Battery/Alternator test...

Add one more test to that though, test with the ignition on and ignition off as well as the tests in that thread.

 

[hrocha35.hr]

It was not much of a test because the battery was not fully charged. But, the first values before i turn on the lights, and the second value 2 minuts after i turn off the lights after 7/8 minuts turned on. It looks normal i beleave!

 

[PURPLE_2L_LX]

Any change with the ignition lights on but not turned to the cranking position?

 

[hrocha35.hr]

No changes that i could see Purple.... im sending a new video and if you please can check it out do see if is there anything wrong with what i am doing... please

20230315_202323.mp4

drive.google.com

 

[hrocha35.hr]

Problem solved. Changed the solenoid. Tks for the help. Best regards