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Discussion Starter · #1 ·
Hi all...

My MGF Trophy 160 was running wonderfully until I went over a large speed bump this afternoon - the motor cut out and the A.A. traced it to a blown 30a fuse under the bonnet, which blew again immediately as it was replaced.

The Fuse cover shows that it goes straight to the multifunction relay just before the ECU, so it looks like I've an earthing problem somewhere between front and back.

Does anyone have a diagram for the location of the wires that I'll need to trace to source the problem - or any hints and tips?

Also, my local MG specialist closed down last friday (Sewards of Grove Road, Christchurch) so I'm stuck for local specialists... any of the Mobile Mechanic brigade cover the Christchurch, Dorset area?

Hope someone can help - ROO is my only transport! (Brave, I know - but I had to have an MG again.. the withdrawal was too much to handle)

Ttfn

Nigs
 

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Well, the MFU, controls the windows amongst other things, so first do they still work?

I bet you have a short somewhere in the loom thanks to the bump.

Its going to be a nightmare to find it, and you will need a multimeter

Any "good" auto electrician should be able to find the issue, as on the bright side the trophy dosn't have any nasty BCU to worry about.

I do have the wiring diagrams for the F there are alot of them, so if you could narrow it down I could email them over.

PS, if you MFU is faulty just remove it to see if the main fuse still blows or not, its the red box around the back of the fuse panel on the drivers side.

PPS, what fuse number under the bonnet keeps blowing?
 

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Discussion Starter · #3 ·
Hiya - it's the "Engine Management" 30a fuses by the CDL/Alarm fuse. The windows still work - everything seems happy except there's no juice from these to the ECU... AA replaced them and they sparked/blew immediately, even without the key in the ignition.

See in this photo:
http://www.mgfcar.de/fuse/Fuse3.jpg

My fuses are slightly different ratings - 15a / 15a / 20a / 10a / 30a / 30a
 
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