Car just cut-out - no power?

[Teetertank]

On a short journey back from work this evening the chim stuttered a few times then cut out and wouldn't restart. Problem is clearly electrical - fuel pump wouldn't wouldn't prime and engine completely dead, no starter, low loader.

Recently fitted a Megasuirt, so would initially suspect something related. But checked all the fuses (number 12 blown but looked it up and should be cigar lighter) all others ok. Dash lights etc work but appears no power is getting to the ECU.

Any ideas? If there is no power at the ECU could it be mobiliser related or something to do with the 100A fuse?

[scotty_d]

Inertia switch is the first thing i would check.

Then the 100 amp fuse next and when down there any way for all it cost just fit a new one as they can crack and be intermitant.

Or it could be a immob fault but i would look at the first two before going any deeper.


Sounds like the Inertia has had a little knock tbh.

[Teetertank]

Thanks Scotty,

Is the inertia switch behind the doors? If so driver's or passengers and how do you check the switch has activated.

[Teetertank]

Ok, I think I found the inertia switch under the "glove box" flap. (Smallish black box with ball bearing inside and push button with rubber cap on?)

Pushed the button and still no joy.

So if it's the 100A fuse, would the dash lights, headlamps, stereo etc not function - they still work fine so have my doubts.

Have checked for voltage on the power feed to the ECU and definitely nothing there.

Edited by Teetertank on Thursday 9th December 15:10

[miniman]

Are the two fuel pump relays still present in the system?

[Teetertank]

miniman said:

Are the two fuel pump relays still present in the system?

Yes, relays still present. No relays have been removed.

[miniman]

Teetertank said:

miniman said:

Are the two fuel pump relays still present in the system?

Yes, relays still present. No relays have been removed.

Try swapping the two identical ones over.

[Teetertank]

miniman said:

Teetertank said:

miniman said:

Are the two fuel pump relays still present in the system?

Yes, relays still present. No relays have been removed.

Try swapping the two identical ones over.

Thanks, will give that a go.

[Stig]

Immobiliser would be my guess. My Griff let me down in Le Mans in the same way - turned out that the immobiliser had lost its earth.

[Teetertank]

Stig said:

Immobiliser would be my guess.

I suspect immobiliser too.

The LED on the centre console goes out when I press the fob, and doors lock like normal. Any way to test it without removing the dash top?

[Hedgehopper]

Had similar problem in the summer. Not knowing what else to do I disconnected the battery and 30secs. later reconnected it, all has been well ever since.

[Teetertank]

Hedgehopper said:

Had similar problem in the summer. Not knowing what else to do I disconnected the battery and 30secs. later reconnected it, all has been well ever since.

Guess I could try that too, but have pulled every fuse, so may in effect already have done the same thing.

[Jonny cobra]

Same happened to me It was the 100 amp fuse new one fitted all ok since and the car seemed to drive alot better .????

JC