[Healeys] Electrical Help

[John Harper]

Kees

With these old hot wire flasher units the fault with low voltage is that 
the lamps stay on rather than flash. When working normally the thin 
wire; in series with the lamps gets hot and expands to the point where 
an internal switch breaks the circuit. The wire then cools and the 
circuit is remade and the lamps come back on. The switch action is an 
over centre arrangement like in a micro switch so it snaps open and 
snaps closed.

This can same condition can be seen when a lamp blows and only one is in 
circuit. The good lamp will stay on but not flash

Regards

>These old Lucas relais for the indicator need a highish voltage 12,5V +
>to work properly. If the voltage drops the frequency drops eventually to
>0, so the indicator will only light up, not flash. In essence it means
>that you have not enough charge or voltage.
>Kees Oudesluijs
>NL
>

-- 
John Harper