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MG MGF Technical - Battery light stays on when engine is running.
|My wife has owned a Eunos Roadster for a number of|
years and only lets me drive it when she is in
attendance (her pride and joy). She is a member of the
local MX5 club and I am a member of the local MG Club
as we have mutual friends who own a mixture of the
I had the opportunity to purchase and took it to buy
an MGF 2001 bog standard model in mint condition,
engine sounds great and goes well, however I had
problems starting her and decided that as the battery
was 4 years old, I would replace it and duly did so.
Installed said battery, no problems starting the engine but the battery warning light stays on. Any ideas on how I could cure this problem without trundlilng down to the MG dealer. I will also see
if some of my MGF friends can throw any light on the
subject, but all views are welcome
|Was the battry warning light on before changing the battery as well. If so, the generator??? may be faulty.|
Thanks for your comments.Bought this car at auction
and it sounded ok. Staff had to jump start it so
I could leave the premises. I ran the car along a
local dual carriageway for some miles and time in
order to charge up the battery and felt that I had
not bought a "dud", all was running sweetly and no
horrible warning lights came on or stayed on. Yet
when I came to a stop and turned off the engine, I
could not restart it, not even a click, without
using jump leads. Again once it was going, it was
ok, but as soon as I put on the headlights, the engine
cut out, so hence I put in a new battery and now the
battery warning light stays on!
|Sounds like the engine has been running on the battery itself. Could you check the charging of the battery with a voltmeter.|
it could also be a bad contact at the batterycables or something like that.
|Check the connections on the alternator. You will have to remove the cover under the rear parcel shelf. Check that the connections are OK on the alternator. Don't put a spanner on the the main big cable connector until you have disconnected the battery.|
I had the main cable fray at the alternator and the battery slowly went flat over a period of time. NO warning lights etc.
If this isn't the problem then it could be your alternator itself.
|Hi! Johan & Bruce,|
Many thanks for your advice and commonts. I have
booked the car into the Phoenix MG dealers in
Northampton for their mechanics to have a look at
the problem. £69 per hour for the first hour "thank you very much", but tomorrow (Sunday) and I will
remove the cover under the parcel shelf and shall
fiddle around (battery disconnected of course) in
the hope that I can save myself some money.
Will let you know the result, one way or another.
|Dont forget your radio code before you whip the battery lead off !|
1. Faulty alternator
2. cable from the starter motor to the alternator (fixed
by a screw has come loose.
2. was the problem I had.
|To everyone who tried to help!|
Had to give up on Sunday, could not find the fault
and had to take it to the MG dealership, who surprise,
surprise, found it was a faulty alternator. £300
later I have got a very nice car that runs very well
and the battery light does not come on when the
engine is running.
They also told me I need two new rear tyres at £125
each (get lost) and that the front discs and pads are
badly warn which they will do for about £250 (get lost). One of my MG contacts can obtain the
ventilate discs and pads and will do it for £125 all
in. Tyres, well I suppose I better ring National,
Kwit-Fit and other locals to see what deals they are
Thanks for your support. Its good to know this site
Regards - Bill
Before spending money on tyres, look into the archive and recent threads. Some tyres have caused F/TFs to become quite twitchy for up to 500 miles of running in.
The new TOYO TS-1S & R range have got a very good reputation in a short space of time (I've used them on a previous F and they will go on the TF sometime during 2005).
Bridgestone also get good reports.
Goodyear F1 were considered the 'bees knees' for the F until GY changed the compound and caused some problems.
Thank goodness the NCT3 has been dropped and the NCT5 is not considered a suitable alternative.
So far, my TF has been very dependable on the OEM CONTIs.
This thread was discussed between 04/02/2005 and 08/02/2005
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