Vespa Et4 project need help with electrical
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Lurker
Vespa Et4 150cc 2003
Joined: 09 Apr 2020
Posts: 3
Location: Australia, sunshine coast
Sat Apr 11, 2020 5:33 pm quote
Hi there I have takin of all the plastic panels to spray paint my Vespa Et4 and now when I'm putting it back together I need some help with the electrical connections for the headlight etc can't get it to work so if anyone here could send me a link or walk me through the steps would be awesome I have considered changing the headlight or upgrading so if anyone have a recommendation I appreciate it I'll add some photos so you can see what I'm dealing with. thank in advance for any help:)

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Hooked
2003 Vespa ET2
Joined: 05 Apr 2019
Posts: 275
Location: Cambridge, MA
Mon Apr 13, 2020 8:48 am quote
i have an et2 that im building...some of the parts are the same...i believe its 3 wires for the headlight...

can you take a picture of the back of your headlight?
Lurker
Vespa Et4 150cc 2003
Joined: 09 Apr 2020
Posts: 3
Location: Australia, sunshine coast
Mon Apr 13, 2020 3:49 pm quote
Picture from the back
Here's a picture from the back. See anything useful?

IMG_20200414_094506.jpg

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Ossessionato
73 Rally, 74 Rally, 76 ET3, 80 P200, 06 PX150, 65 Li225 Silver Special, 86,95,96 Elite 80s, 2015 HD Road Glide Special, 2011 Ural Tourist
Joined: 18 Jan 2012
Posts: 3616
Location: Oceanside/ SF
Mon Apr 13, 2020 3:54 pm quote
Start connecting everything that matches colors and connectors. Send pics of what’s left
Sergeant at Arms
Weird 80's Vespas & Cool Vintage Lambrettas
Joined: 21 Oct 2005
Posts: 7724
Location: The state of insanity, SoCal
Wed Apr 15, 2020 4:25 pm quote
the first photo is of the connections for the CDI (white) and the black rectangle is a fuse block (check to see that they're good).

the second and third photos are for the brake switch connections.

the headlight connection is purple, brown & black. the yellow and gray (some times black) is for the running light.

you'll need to connect your headlight switch in order for it to function (that's the red thing to the right in one of your photos) there's enough lead in the wiring that you can test for function before reassembling everything.

everything fits in its own connector so you can't really mix it up. you'll probably have one or possibly two additional two gang connections left over. one is for running lights (euro version) and the other is accessory (ie cigarette lighter).

if you're this far in, i'd suggest going with a euro headlight conversion. but i'd get it all working first.

hth

-g
Hooked
2010 S50 Modified "Punkin"; 2003 ET4 150 "ISO"
Joined: 18 Feb 2017
Posts: 282
Location: Deepinnaharta, Texas
Sun Apr 19, 2020 12:48 pm quote
Greetings:

It appears we have similar scooters. Can you still tell me if the wires I circled in your pic from 4/13 are pink and blue-white?

I suddenly seem to have an issue with my turn signals - probably User Error - and the signal switch includes these colors. Can't see where it attaches. Does yours have a corresponding connector someplace>

TIA
Guy

ET4ClusterWires.jpg

Lurker
Vespa Et4 150cc 2003
Joined: 09 Apr 2020
Posts: 3
Location: Australia, sunshine coast
Wed Apr 22, 2020 3:15 am quote
Thanks for the replys nearly got everything working just have a couple of wires that I can't figure out I'll post some photos to shed some light on what these can be?

IMG_20200422_172237.jpg

IMG_20200422_172300.jpg

IMG_20200422_173017.jpg

Ossessionato
73 Rally, 74 Rally, 76 ET3, 80 P200, 06 PX150, 65 Li225 Silver Special, 86,95,96 Elite 80s, 2015 HD Road Glide Special, 2011 Ural Tourist
Joined: 18 Jan 2012
Posts: 3616
Location: Oceanside/ SF
Wed Apr 22, 2020 3:51 am quote
First pic looks like it goes to a relay. Do you have any lighting switches missing a plug?

Second pic do you have both brake switches connected?
Hooked
2010 S50 Modified "Punkin"; 2003 ET4 150 "ISO"
Joined: 18 Feb 2017
Posts: 282
Location: Deepinnaharta, Texas
Thu Apr 23, 2020 6:27 am quote
See If This Helps?
Greetings:

This helped me tremendously. Hope it does you good too.

ET4WiringDgmRZ2.jpg
Check the Colors to Know What Circuit

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