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Switched 12v feed
Posted: 14 Jan 2026, 17:25
by Madmaninshed
Hi, I am trying to wire in a TomTom cradle and a dash cam, as I am keen to avoid dangly cables across the dash. Someone has removed the small 12v supply point from the dash. Is there an easy point I can pick up a switched 12v supply please in the dash/ fuse box area?
Re: Switched 12v feed
Posted: 14 Jan 2026, 19:38
by Mocki
What age van , fuse boxes are early and late , so cannot answer without knowing
Re: Switched 12v feed
Posted: 14 Jan 2026, 20:29
by Madmaninshed
Hi Mocki,
Thanks for your reply. it is a 1986 van.
Re: Switched 12v feed
Posted: 15 Jan 2026, 07:19
by Mocki
So blade fuses……..
Late fuse box pin outs
Pin G1 (top left)
X-Contact (12v when running).
Black / Yellow wire for rear warm air blower if fitted.
Internal connections to:-
E8 - Back / Grey to rear wiper motor pin 53a
G3 - see below.
Output from fuse S12 -20 amps.
Relay 11 - pin 3 (53a)
Pin G2 (top right)
Ignition live -
Optional black wire to Cruise control where fitted.
Internal connections to:-
A25 - Black wire to brake warning indication light.
D7
G5 - see below.
Output from Fuse S18 - normally 10amps, but uprated to 15amps where cruise control is fitted.
Pin G3
X-Contact (12v when running).
Normally signified by Black / Yellow wires.
Internal connections to:-
G1 - see above
E8 - Back / Grey to rear wiper motor pin 53a
Output from fuse S12 -20 amps.
Relay 11 - pin 3 (53a)
G4
Alternator Charge Light Signal.(61 rail).
Blue wire to auxilliary battery cut-out relay pin 86 where fitted.
Internal connections to:-
A16 - sometimes wired instead of E13, or wired to B1.
B1 - Blue wire to charge light in instrument cluster
C2.
D4
E13 - Blue wire to alternator pin D+
Pin G5.
Ignition live supply
Internal connections to:-
A25 - Black wire to brake warning indication light.
D7
G2 - see above.
Output from Fuse S18 -10 amps.
Pin G6
No specific function.
Internal links only to pins:-
A4
D1
Pin G7
56 Voltage rail. (Feed to head lamp circuit).
Internal connections to:-
A9 - White / Black wire from light switch pin 56, and also to the dip / high beam stalk pin 56.
M1 - not used.
G8
Dimming illumination.
Internally connected to:-
A1 - Grey / Blue wire for all dash switches and output from light switch rheostat).
G9
Non-dimming Illumination.
Internally connected to -
A26 - Grey wire to lighting rheostat pin 58e.
E1 - Grey / Green wire to rear number plate lights,
And fuse S20.
G10
X-Contact (12v when running).
Internal connections to
A19 - Green / Red to wash / wipe stalk switch pin T
C9 - Green / Red to front washer pump.
D5.
Re: Switched 12v feed
Posted: 15 Jan 2026, 16:51
by Madmaninshed
Thanks Steve, I’ll study that and get it sorted
