Ignition-switched supply
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Looking to wire in an electric fuel pump.
Before I pull a new wire back into the boot area, is there anything there
I can hook into ?
Regards and thanks,
Stuart.
Before I pull a new wire back into the boot area, is there anything there
I can hook into ?
Regards and thanks,
Stuart.
- stuartgb100
- Fourth Gear
- Posts: 891
- Joined: 10 Sep 2005
I ran a new wire rather than relying on the already-too-small wire back there. It's not hard to go under the carpeting and into the trunk/boot. I also added a ground from the fuel pump to the chassis for the same reason.
Art Frederick
S2 Roadster, built in 1965, registered in 1966, No. 26/4934
Nothing else of interest at present
S2 Roadster, built in 1965, registered in 1966, No. 26/4934
Nothing else of interest at present
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frearther - Fourth Gear
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- Joined: 23 Sep 2003
frearther wrote:I ran a new wire rather than relying on the already-too-small wire back there. It's not hard to go under the carpeting and into the trunk/boot. I also added a ground from the fuel pump to the chassis for the same reason.
I ran my electric fuel pump with a dedicated wire from the ignition switch to the boot for many years without difficulty. As part of my recent rewiring exercise, I ran a new wire alongside the regular body harness (runs in the left-side sill), and fed it from a relay rather than directly from the ignition switch. The relay is controlled by the ignition switch terminal that feeds the coil. I also fused the fuel-pump feed.
I try not to run components with a significant current draw - headlights, horn, fuel pump, heater fan etc. - directly through the old switches. Relays were designed for such tasks.
Andrew Bodge
'66 Elan S2 26/4869
I love the sound of a torque wrench in the morning. Sounds like... progress.
'66 Elan S2 26/4869
I love the sound of a torque wrench in the morning. Sounds like... progress.
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RotoFlexible - Fourth Gear
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- Joined: 01 Sep 2005
RotoFlexible wrote: As part of my recent rewiring exercise, I ran a new wire alongside the regular body harness (runs in the left-side sill), and fed it from a relay rather than directly from the ignition switch. The relay is controlled by the ignition switch terminal that feeds the coil.
That's what I did when I put the electric pump in about 20yrs ago. Relay is mounted under the cardboard panel that goes across the back by the lights with a direct feed from the battery and an in line fuse. Pump is mounted in the small space between the fuel tank and the wing - on the right as you look at it from the back. It's been totally trouble free since it was put in.
Stuart Holding
Thame UK / Alpe D'Huez France
69 S4 FHC
Honda GoldWing 1800
Honda CBX1000
Kawasaki H1 500
Yamaha XS2
Thame UK / Alpe D'Huez France
69 S4 FHC
Honda GoldWing 1800
Honda CBX1000
Kawasaki H1 500
Yamaha XS2
- 69S4
- Coveted Fifth Gear
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- Joined: 23 Sep 2004
Hi Stuart
On the S2 the GN (green/brown) wire is not used, (reverse lamps). I put that to the switched side of the ignition and used that for the fuel pump. Up front on the dash I used the heater blower switch as a kill switch as the heater was omitted during the build. I don't know what you are working on so can't comment further but I would want a dedicated wire for a fuel pump, maybe that's just me though. I still need the bump switch to make it a bit safer, one day I hope it will get done before it bites (burns?) me.
On the S2 the GN (green/brown) wire is not used, (reverse lamps). I put that to the switched side of the ignition and used that for the fuel pump. Up front on the dash I used the heater blower switch as a kill switch as the heater was omitted during the build. I don't know what you are working on so can't comment further but I would want a dedicated wire for a fuel pump, maybe that's just me though. I still need the bump switch to make it a bit safer, one day I hope it will get done before it bites (burns?) me.
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garyeanderson - Coveted Fifth Gear
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- Joined: 12 Sep 2003
Thanks all for the replies.
I've run a dedicated 17amp rated supply from the fuse box (ignition-switched)
through the cabin (for now) and into the boot via a gap between the rear screen
and the parcel shelf (another job for another day). I've fitted an inline fuse.
I'm going to order up 1 maybe 2 in-line manual kill switches and am also doing a
bit of research on a fail-safe fitted to the very last + 2s. I believe it was one of
the things Lotus did towards the end of the Elan production run when safety
became a bit more of a legal requirement.
I don't yet have a +2 parts manual, so if anyone can give me a heads-up, it
would be much appreciated. I'm told it's clearly detailed.
Regards and thanks again,
Stuart.
I've run a dedicated 17amp rated supply from the fuse box (ignition-switched)
through the cabin (for now) and into the boot via a gap between the rear screen
and the parcel shelf (another job for another day). I've fitted an inline fuse.
I'm going to order up 1 maybe 2 in-line manual kill switches and am also doing a
bit of research on a fail-safe fitted to the very last + 2s. I believe it was one of
the things Lotus did towards the end of the Elan production run when safety
became a bit more of a legal requirement.
I don't yet have a +2 parts manual, so if anyone can give me a heads-up, it
would be much appreciated. I'm told it's clearly detailed.
Regards and thanks again,
Stuart.
- stuartgb100
- Fourth Gear
- Posts: 891
- Joined: 10 Sep 2005
RotoFlexible wrote:frearther wrote:I try not to run components with a significant current draw - headlights, horn, fuel pump, heater fan etc. - directly through the old switches. Relays were designed for such tasks.
Hear! Hear!
Mechanical Engineer, happily retired!
'67 S3 SE FHC
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'67 S3 SE FHC
See Facebook page: W J Barry Photography
Put your money where your mouse is, click on "Support LotusElan.net" below.
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Galwaylotus - Coveted Fifth Gear
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