Alfa electrics problem

Nonoperational · 27-09-2009 11:09am #1

Basically the 10 amp fuse that has the reverse lights, 2 interior lights and the switched power supply for the radio blows every time I brake. The brake lights are on a different fuse so I cant understand whats going on. Another clue might be that once it blew and an ABS failure came up on the infocenter but that only happened once and went straight away leaving no warning lights on or any more messages.

Its getting very annoying now so if anyone has any suggestions before I go to the auto electrician Id appreciate it. Thanks

johncm · 27-09-2009 11:16am

i cant help but when i had my alfa i found the guys in http://www.alfaowner.com/Forum/ very helpful.

Nonoperational · 27-09-2009 11:22am

Been there! In fairness its a dirty thing to diagnose on a forum just hoping someone might have come across it before.

anon11 · 27-09-2009 11:40am

Could be a faulty brake light switch i know these give problems causing abs vcds failure:)

Nonoperational · 27-09-2009 11:43am

Where is this located?

fryup · 27-09-2009 11:50am

gpf101 wrote: »

Been there! In fairness its a dirty thing to diagnose on a forum just hoping someone might have come across it before.

a dirty thing

why??

forums are there to help are they not??

anon11 · 27-09-2009 11:52am

Just over the brake pedal.

Nonoperational · 27-09-2009 11:54am

fryup wrote: »

a dirty thing why??

forums are there to help are they not??

Its probably the sort of thing that needs hands on but hopefully I might get a few ideas anyway!

kyote00 · 27-09-2009 12:44pm

it may be that some part of the 10amp circuit is being shorted (physically) when you press the brake pedal...

Does it have the standard radio/stereo in it or an aftermarket one ? If its an aftermarket installation then I'd check all those connections for loose or frayed connections...

the merchant · 27-09-2009 1:08pm

the link between the two circuits you mention would be one of the tail lights i.e. Reverse and stop lights.
try disconnecting one of the tail tight clusters and see how that goes. If that fuse blows try the other one.

Nonoperational · 27-09-2009 3:05pm

Interesting. The reverse lights are in a different cluster to the brake lights so should I try disconnecting the 4 lights individually and see if one is to blame?

Nonoperational · 28-09-2009 3:03pm

Sorted! Finally I think I have it. The mechanical action of pressing the brake pedal was causing it to rub off the bunch of wires running close to it. It had sheared off the cover and the insulation around one wire presumably causing a short when the metal from the brake pedal came in contact with it. A few rounds of insulating tape and it seems perfect!

kyote00 · 28-09-2009 5:03pm

do I get a prize

kyote00 wrote: »

it may be that some part of the 10amp circuit is being shorted (physically) when you press the brake pedal...

Does it have the standard radio/stereo in it or an aftermarket one ? If its an aftermarket installation then I'd check all those connections for loose or frayed connections...

Nonoperational · 28-09-2009 5:46pm

Excellent, I'll pop the prize in the post first thing!

the merchant · 28-09-2009 6:10pm

Shows what I know about electrics :-)

Zube · 28-09-2009 6:40pm

the merchant wrote: »

Shows what I know about electrics :-)

Like it says in the charter:

* This is a public forum used by people with no idea what they are talking about.

Nonoperational · 28-09-2009 7:53pm

Thanks for the input lads. Saved myself 100 quid with the auto electrician anyway!

Alfa electrics problem

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