77, 340 Liqufire dim lights

[ljm]

Just got my 77 340 Liqufire together. Starts and runs great.
When the headlights are on they are extremely dim. The tail light, brake light and dash lights work normal till you turn the headlight on, then all the lights get dim, tail and brake lights don't have .enough juice to work

I tried changing the headlight bulb. It didn't make a difference.

any suggestions?

Lloyd

[harleysportster]

Sounds like you have a bad ground with the headlight. Clean all the terminals from the headlight, the main terminal board on right side and the main engine connector.

[JDT]

Check you harness from the engine to the headlight.
You may find a spot on it where the wires are melted from touching the muffler or have been bared from rubbing on something.
If there is a short on a few strands of the wire it can suck the voltage down when you turn on the headlamp.

I have also seen this problem on the handlebar wiring to the dimmer switch.

And as Pat mentioned check your grounds.
If you loose ground on a dual elemet bulb the current will back feed to find a ground connection.
In effect what happends is both elements try to light at the same time.
The stator does not have the capacity to run both high and low beams at the same time so they get real dim.