OP
UTC

Addicted
1968 VBB150
Joined: UTC
Posts: 693
Location: OC
 
Addicted
1968 VBB150
Joined: UTC
Posts: 693
Location: OC
UTC quote
Hi All!

Can the lights/switched be tested with a battery pack on scoots with no battery? (ac or dc) If so, how? It would be nice to not have to have the engine running while troubleshooting.

Thanks!
⚠️ Last edited by dsnyder586 on UTC; edited 1 time
@scooterist avatar
UTC

Molto Verboso
71' Sprint Veloce , 05' Vespa PX150, 1978 P200E
Joined: UTC
Posts: 1546
Location: Tucson, AZ
 
Molto Verboso
@scooterist avatar
71' Sprint Veloce , 05' Vespa PX150, 1978 P200E
Joined: UTC
Posts: 1546
Location: Tucson, AZ
UTC quote
To some extend you can test a lot of the electrical components without having the engine running. I don't know what model of vespa you have but I tested horns, turn signals, headlights with battery and a power supply. I also tested stuff with a dmm and a test light, mainly continuity.
It depends what you want to test, if you want to do DC then a battery or battery packs will do it, for AC current You would want the stator spinning but again you can also test other stuff on the stator without power. What are you trying to do exactly?

The switches can be tested with minimal voltage, you can also test for continuity. The lights can be tested as long as you can satisfy the current to lit up. They might lit too dim if you don't have the right amount of voltage/current.

I test my stuff with a bench power supply, battery, DMM and a test light. You don't need all of them but it it nice to have.
OP
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Addicted
1968 VBB150
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Addicted
1968 VBB150
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UTC quote
Thanks!

180ss no battery (AC)

I was thinking of hooking up a 6v battery pack to the lighting circuit and making sure everything works. I just need ANY light, I don't need them to be bright for the testing.
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UTC

bodgemaster
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
Joined: UTC
Posts: 7104
Location: So Cal
 
bodgemaster
@socalguy avatar
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
Joined: UTC
Posts: 7104
Location: So Cal
UTC quote
dsnyder586 wrote:
Thanks!

180ss no battery (AC)

I was thinking of hooking up a 6v battery pack to the lighting circuit and making sure everything works. I just need ANY light, I don't need them to be bright for the testing.
This works. I use one of those big 6V lantern batteries. Disconnect the wires from the stator at the junction box. It's not a good idea to send DC voltage back through the stator coils.
OP
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Addicted
1968 VBB150
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Addicted
1968 VBB150
Joined: UTC
Posts: 693
Location: OC
UTC quote
Perfect- thank you SOCAL!
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UTC

Molto Verboso
71' Sprint Veloce , 05' Vespa PX150, 1978 P200E
Joined: UTC
Posts: 1546
Location: Tucson, AZ
 
Molto Verboso
@scooterist avatar
71' Sprint Veloce , 05' Vespa PX150, 1978 P200E
Joined: UTC
Posts: 1546
Location: Tucson, AZ
UTC quote
What socalguy said. The 6V battery source would do it. Do you have access to the diagrams? look on scooter help.com.
UTC

Ossessionato
Vespas 1964 GS160, 1965 SS180, 1977 V9A1T, 1983 PX150E
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Posts: 2537
Location: Siam
 
Ossessionato
Vespas 1964 GS160, 1965 SS180, 1977 V9A1T, 1983 PX150E
Joined: UTC
Posts: 2537
Location: Siam
UTC quote
SoCalGuy wrote:
This works. I use one of those big 6V lantern batteries. Disconnect the wires from the stator at the junction box. It's not a good idea to send DC voltage back through the stator coils.
That's a cool idea.
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