The Dispatch | Expert | Scudo Hub

March Hare

Member

Registered: 2021-01-25

Posts: 17

Gremlins! 12v confusion.

Hi all.

X reg Scudo 1.9 non turbo.

As of yesterday, when I turn off the ignition (and remove the key), I still have dim sidelights and the warning buzzer. Clearly a short somewhere.

If I turn the sidelights on they brighten up, and the warning buzzer changes tone. So they are not getting full power from the short.

I suspected a stuck relay. But I have removed every one I can access, one by one, both in the dash and under the bonnet - no change. Not sure which ones do what anyway!

Unplugged the indicator stalk/light switch - no change.

If I remove fuse 25 (10A, stereo, interior lights. clock, instrument panel lights) the fault goes away. Instrument lights work fine. Stereo and interior lights dead - until I turn the sidelights on, then everything works again!

Unplugged the stereo - no change.

If I remove fuse 4 (5A, stereo, sidelights and buzzer, instrument panel lighting) there is no change at all.

What else has power when the ignition is off? Other than sidelights, interior lights, and the stereo for its memory?

Anyone know which relay controls the sidelights?

Could it be a bad earth?

I'm stumped for now. Any help or suggestions welcomed!

Fred1203

Member

Registered: 2023-04-30

Posts: 11

Re: Gremlins! 12v confusion.

This is what I used, for different issue.  Might help but from Citroen jumpy

Last edited by Fred1203 (2023-07-03 18:21:59)

March Hare

Member

Registered: 2021-01-25

Posts: 17

Re: Gremlins! 12v confusion.

I guess that was a link..?

AlvyLad

Member

Registered: 2021-06-11

Posts: 481

Re: Gremlins! 12v confusion.

I guess that was a link..?

It's a .pdf, re-upload
https://www.mediafire.com/file/nejq2h28 … s.pdf/file

JohnDragonMan

Member

From: Derby, East Midlands, UK

Registered: 2020-06-02

Posts: 456

Website

Re: Gremlins! 12v confusion.

i wonder if its the illumination for your radio...  somehow leaking back into (i think) pin 7 on the power iso plug. unplug the radio its self and see if anything changes. the fact the lights go out when fuse 25 is unplugged tells you that that is the source of the power getting to the side lights. something on that circuit is what is powering the lights... i would start with the radio.

earths are a possibility but usually with an earth when the ignition is off, the fault goes away.

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- JohnDragonMan
Notice: I have the tendency to void warranties, blow fuses, cause fires, and other fun stuff.
Words of wisdom: Internally rust proof the sills and subframe! both skins!!. There's always user serviceable parts inside. "Oh that shouldn't have happened".
My 2005 Dispatch Camper Project

OAT

Member

From: Borders/Dales

Registered: 2017-01-03

Posts: 1,013

Re: Gremlins! 12v confusion.

Have you checked the curtesy light switch in the door jamb?