412 / Beaufighter wiring & wiring diagram

[Andy603]

James

I had similar problems with my 603, which being of similar vintage may have
bits in common.

The volts to the indicator flasher unit go through the hazard light switch.
All connections to this and the innards need to be clean.

The volts to my headlamps go through the switch, this had been arcing and
the casing had melted. I purchased a replacement switch from BCL, then
subsequently found one at an autojumble for a couple of quid. The main beam
on mine goes through a 26 amp relay by the fuse panel but the switch on the
indicator stalk arcs so may be badly pitted, I always use the footswitch.

Drawings are on the Bristol Owners Club website.


Andy

[browning l]

To assist further in locating these, look in the BOC site, in their Libary section, under 603s.

Here's the site: Member Area - Login

I have downloaded the complete 603 Owner's Manual, as well as a number of the wiring diagrams.

Good luck!

Lou B.

[Kevin H]

There's an online version of the owners manual on this site here . No paid up membership required

Unfortunately no wiring diagrams, but the electrical system could do with some modernisation anyway.

[browning l]

I guess I just assumed that nearly everyone seriously interested in Bristols would be a BOC member.

James, if you would like me to email you any wiring diagrams, just please let me know at mmm@maysvilleky.net, and I'll be more than happy to do so.

Here's a list of what is shown to be available:

Wiring diagrams (PDF thanks to Clive Foster)
Speed Control circuit: SVG/PDF
Headlamp circuits
Side, rear and dash lamps
Foglights & heater
Rear window & gauges
Electric Window Lifts
Boot lid, fuel filler & Sunshine Roof
Fans, horn, clock, lighters & aerial
Seat back adjustment & int. lamps including red warning lamps in door armrests
Wiper motor and wash/wipe: SVG/PDF
Flasher, Hazard, Stop & Reversing lamps and Battery condition indicator
Fuse layout: SVG/PDF
Air conditioning: SVG/PDF
Oil Pressure Unit, Carb Solenoid & electric choke: SVG/PDF
Ignition/starter switch: SVG/PDF/PNG
Alternator voltage control circuitry: SVG/PDF/PNG
Seat-belt drawings (thanks to Graham Bell)
Seat belt assembly
Long End assembly

Lou B.

[browning l]

These are for a 603; obviously they may/may not be of help for you.

[JLucy]

Thanks to all for the extremely helpful replies. I am in fact a BOC member
so I will look at the 603 material there.

I will try to make my own contribution to the sum total of Bristol knowledge
if and when I discover some!

James

[412usa]

James,

I have a factory wiring diagram (original blueprint) for the 412USA but it
may have difference to the Beaufighter and I wouldn't want to lead you
astray with, perhaps devastating consequences.

I suggest you ask the factory for help.

Peter