i have to jump start my car each morning despite having purchased 2 new batteries and i also have had diagnostics done on it which showed up no drain from the battery. Any clues
Hello and Welcome to justanswer...Can you please give me the Full details of the vehicle you have.....Plus - is it that the engine turns too slowly to start in a morning?Have you had any tests / work done on the vehicle of late ?The more info you can give me, the better....KInd Rgds , MIKE...............................................
.engine does not turn at all/battery totally drained.I have had diagn. cannot find any draw on the batteryostics done on it which came up with nothing
Hello again.. thank you for your reply and info - I do however, need to know the vehilces FULL details - its make / model - engine type / size - mileage etc etc.....I can't help you at all without the information...Kind Rgds , MIKE...................................
skoda octavia/ 1.9tdi milage100095kms year 2006
Thank you for your reply and further info..Regardless of the diagnostics that have been done, there is obviously a problem with the battery draining so something has been missed...There are no common faults with this model in this regard so its going to be a case of having this checked to find the cause of the battery drain.."Ordinary " plug-in type diagnostics are not going to find / cure this - It has to be done with a multi meter - ohm meter - a specific test procedure on the battery ...So, The first thing to do is a test for a major short. Remove the positive and negative cables from the batteries. Put an Ohm-meter across the positive and negative cable. If your reading is close to 0 Ohms then you have a direct short. You need to trace the short before you can perform the following tests.
If you are drawing too much current in the system, the first steps would be to check engine compartment components. Disconnect the wire to the alternator to rule out diode back draw in the alternator itself. Then, disconnect the main engine cable connection to the electrical fuse blocks.
Disconnect all add-on components wired directly to the battery or positive main engine block terminals. Look for elimination of the excessive amperage draw, one item at a time. Disconnect the starter motor, check the draw.
Once the engine compartment is ruled out, you would need to go to the fuse boxes and pull each fuse one at a time - looking for correction of your excessive current draw on your meter...
Also remember to bear in mind what I mentioned re the modules on the car - that shut down after a few mins after shut off.. this can takes up to half an hour so be aware of that. If it never shows a reduction in draw - then one of the modules isn't shutting down - and that would need investigating further then.
Lastly - common faults are things like the boot light and glove box lights coming when the vehicle is left unattended... due to faulty switches - so you can even start by removing the bulbs on these...and seeing if the battery drain stops then - simple as that. If not -then you need to work through as above until you find the fault .
Kind Rgds, MIKE
Feedback and any Bonuses are always appreciated too. Thank you.
can tracing and replacing a defective module be expensive?
Hello again...Thank you for your reply...Tracing it can be very time consuming - it depends on what you come across as you go - you may well find the problem before that ...If it turns out to be a module fault - these are never cheap but I can't be specific obviously as there are several and all different prices... Plus , replacement modules have to be coded / configured to the car - which is an additional cost ....Working through as I have detailed above will give you every chance of sorting this one way or the other...Kind Rgds - MIKE.
Hi, I am a Car/ vehicle technician of 34 years. 29of -running my own repair/diagnostic business.