Headlight Burns Out in 5 seconds.

I have a 1978 AMF Roadmaster 110 and the headlight burns out in 5 seconds and I have no idea why. Is it a bad ground in the stator?

Re: Headlight Burns Out in 5 seconds.

There's no need to make multiple threads on the same topic.

Re: Headlight Burns Out in 5 seconds.

I’m sorry, new here. I thought since they are pertained to separate area’s there should be separate messages

Re: Headlight Burns Out in 5 seconds.

No worries. I replied to your other thread.

Re: Headlight Burns Out in 5 seconds.

Tri-ped Dave O.D.B. /

Before spending more on expensive bulbs, test the headlight power leads with a meter while the thing is running and see if it is getting the correct 6V or reasonably close. If it is you can eliminate stator issue and focus on the correct value bulbs. Head and tail are one circuit, brake is a separate circuit with a resistor. The resistor is ONLY for brake light. If one of the head and tail is blown it will take out the other sooner or later. Check BOTH headlight bulb and tail light bulb for correct value.

Re: Headlight Burns Out in 5 seconds.

I should expect 6V going through the connectors right? (edited)

Re: Headlight Burns Out in 5 seconds.

Yes at the connectors where they connect to the back of the headlight while the bike is running

Re: Headlight Burns Out in 5 seconds.

amf_electrical.PNG

^ From the manual.

6V AC, approximately, yes. When the brake are not applied and the horn is not running, all power from the lighting coil is consumed by the headlight and taillight (which are in parallel). Voltage goes up with rpm, so it may be low at idle.

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