Wiring question…

P38 Monkey

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Posts

628

Location

Cambridge

• Aug 27, 2024

• #1

Am just wiring in a satnav/dashcam combo (Garmin 51) and also a reversing camera screen, both on the dash top centre.
Seems logical (and tidy) to route the wiring behind the panel below the steering wheel.
But where to access +12v and earth?
Is there any easily-accessible switched power under there?
As ever, any advice very gratefully received…

 

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Last edited: Aug 27, 2024

pwood999

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3,878

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Near Heathrow.

• Aug 27, 2024

• #2

I generally use the cigarette lighter feed. That way accessories go off with the ignition.

 

kermit_rr

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33,600

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North Shropshire

• Aug 27, 2024

• #3

pwood999 said:

I generally use the cigarette lighter feed. That way accessories go off with the ignition.

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Even if you only use it to switch a relay

 

Flossie

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11,001

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Shropshire

• Aug 27, 2024

• #4

There is a 12v switched live under there because I used it to run my dash cam. Took some finding with my dmm though. Earth is anywhere metal of course.
I cannot recall the colour of the switched live though sorry.

 

pwood999

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• Aug 27, 2024

• #5

Flossie said:

There is a 12v switched live under there because I used it to run my dash cam. Took some finding with my dmm though. Earth is anywhere metal of course.
I cannot recall the colour of the switched live though sorry.

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That's why I use the lighter feed !!

 

P38 Monkey

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Posts

628

Location

Cambridge

• Aug 27, 2024

• #6

pwood999 said:

That's why I use the lighter feed !!

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I just knew there would be rapid and logical response - thank you … !!

 

Flossie

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11,001

Location

Shropshire

• Aug 27, 2024

• #7

When I say it took some finding that was because it was the last wire I probed probably lol! In my defence, the dash cam I wanted to fit behind the review mirror, the cable went up neatly from the knee panel area, up the windscreen puller behind the trim, then tucked up under the headliner, looks super neat. I suspect, but don't know for sure, that there will be a switched live at the underseal fuse box, easy to run a wire from there under the sill step trim and up the A post to either the dash top or again, up the windscreen trim.