honda305 Home honda305 Auctions honda305 Gallery honda305 Forum


honda305.com Forum

Login
□ Search
□ FAQ 
□ 
Vintage Honda Owners,
Restorers, Riders and
Admirers

tail light

Charging System, Wiring, Lighting
arch379r
honda305.com Member
Posts: 10
Joined: Wed May 26, 2010 7:55 am

tail light

Post by arch379r » Tue Jul 20, 2010 10:20 am

my tail light works. really bright! the stop light only works with the lights off. somebody wrote in a previous posting ( for somebody) that wires are crossed? I reversed the wires near the battery and fender .but no change? should i be looking at connections in headlight bucket?

48lesco
honda305.com Member
Posts: 721
Joined: Tue Mar 06, 2007 1:45 pm
Location: Olmsted Twp, Ohio

Post by 48lesco » Tue Jul 20, 2010 10:15 pm

Hey Arch - Use the color wiring diagram from e3steve at the link below. It corrects the error in the Honda version at the ignition switch. Check your ignition switch connections carefully, and also in the headlight bucket.


http://www.honda305.com/forums/download.php?id=2424

Gunner_CAF
honda305.com Member
Posts: 316
Joined: Sun Oct 12, 2008 5:28 pm
Location: Wisconsin, USA

Re: tail light

Post by Gunner_CAF » Tue Jul 20, 2010 10:30 pm

arch379r wrote:my tail light works. really bright! the stop light only works with the lights off. somebody wrote in a previous posting ( for somebody) that wires are crossed? I reversed the wires near the battery and fender .but no change? should i be looking at connections in headlight bucket?
Check the ground.

Gunner

e3steve
h305 Moderator
Posts: 2601
Joined: Fri Oct 31, 2003 1:38 pm
Location: Mallorca, Spain & Warsash, UK

Re: tail light

Post by e3steve » Wed Jul 21, 2010 3:42 am

arch379r wrote:my tail light works. really bright! the stop light only works with the lights off. somebody wrote in a previous posting ( for somebody) that wires are crossed? I reversed the wires near the battery and fender .but no change? should i be looking at connections in headlight bucket?
And I'll bet it's dimmer than the taillight?

Make sure you've not jammed the lamp (bulb) in the wong way wound; check the wiring from the ig-sw -- TL is white and is 'made' with HL (green) in the IGNITION position and with BA (red) in the PARK postion (c/w). Brake light is the blue wire.

Good shot from Gunner, but if the ground was high-resistance then there would be no taillight at all when selected: path= 12V>via ig-sw>lightswitch HL>ig-sw HL>ig-sw TL>taillight white>via both lamp filaments>taillight blue>brake light switch>-----¦ and dim when brake is applied: path= 12V>via ig-sw>brake sw black>brake sw blue>via both lamp filaments>taillight white>ig-sw TL>ig-sw HL>green (and also white)>ground via meter lamp(s) (and front parking light) assuming light switch OFF.

Gunner_CAF
honda305.com Member
Posts: 316
Joined: Sun Oct 12, 2008 5:28 pm
Location: Wisconsin, USA

Post by Gunner_CAF » Wed Jul 21, 2010 10:32 pm

via both lamp filaments
Before pulling wires off and crossing them, it's a good idea to see if the ground is good. Broken ground wires can sometimes make some unexpected strangeness. It's an easy test, just run a wire from a good grounded point to the tail light case and see what happens. When you trouble shoot, always check the obvious and the easy first :)


Gunner

mobilyte
honda305.com Member
Posts: 118
Joined: Mon Mar 30, 2009 4:57 pm
Location: Chicago

Re: tail light

Post by mobilyte » Wed Jul 21, 2010 10:36 pm

do you mean that you switched the wires near the battery and taillight bracket simultaneously?
arch379r wrote:I reversed the wires near the battery and fender .but no change?

e3steve
h305 Moderator
Posts: 2601
Joined: Fri Oct 31, 2003 1:38 pm
Location: Mallorca, Spain & Warsash, UK

Post by e3steve » Thu Jul 22, 2010 3:03 am

Gunner_CAF wrote:
via both lamp filaments
Before pulling wires off and crossing them, it's a good idea to see if the ground is good. Broken ground wires can sometimes make some unexpected strangeness. It's an easy test, just run a wire from a good grounded point to the tail light case and see what happens. When you trouble shoot, always check the obvious and the easy first :)


Gunner
Good diagnostic starting point, all the same, Gunner.

Post Reply




 

CB-77 | CYP-77 | Road Test | Riding Log | Literature | Zen | Marketplace | VJ Survey | Links | Home