BeCM fault?

Hello

Not sure if it's a BECM fault but all points in that direction.
When I flash the lights, stereo turns off, the speed pointer fall for a moment and the dashboard lights dimms.

Not the alternator, that's for sure (my mechanich assured me).

Here in Portugal i believe no one repairs becm units, but i found a coulpe of shops there in UK.
Could anyone point out one?

Most appreciate
João

(its a P38 2.5DSE, 1998. BeCM High-Line)

The BECM has no connection to the stereo. I would suggest either a bad earth or a problem with the fuse box or battery connections. An internal short in the BECM that would cause such a volt drop would either blow a fuse or burn.

Check that your headlight bulbs are the correct wattage. I've known weird issues like this with the surge from HID aftermarket kits fitted so I suppose you could get the same from rally power bulbs.

Yep, it seems its a bad ground.
Headlight bulbs are the correct wattage. I've noticed, at night, the headlights sometimes dimms..noticed that when stoped at the traffic lights.

Where can i find some kind of map of the grouns points in the P38?
(rave just shows pictures of the locations...not a general view..)

jonasserra said:

Yep, it seems its a bad ground.
Headlight bulbs are the correct wattage. I've noticed, at night, the headlights sometimes dimms..noticed that when stoped at the traffic lights.

Where can i find some kind of map of the grouns points in the P38?
(rave just shows pictures of the locations...not a general view..)

Click to expand...

RAVE shows everything, the trick is finding the information that you need

Well, i begun by the fuse box, and found it this way:




Tomorrow will test the car with other fuse box...

Issues sorted with a "new" fuse box!
Replaced my fused box with a "new" one, and it seems so far that the issues reported vanished.

jonasserra said:

Issues sorted with a "new" fuse box!
Replaced my fused box with a "new" one, and it seems so far that the issues reported vanished.

Click to expand...

The poor old BECM is often blamed when in fact the fuse box is toast

People always think the worst. Why change an engine when it has a faulty spark plug, or in my case an injector