[Roadsters] Instrument regulator test

[Pete Peters]

Although this is for my 411, the instrument voltage regulator is the same for the 311/410/411/510/520/521 and who knows what else.

I did short the leads on the roadster and the 411, and the gas and water gauges both peg to the right. Haven't tested the senders yet.

As for using analog, my venerable Simpson 260 has been waiting patiently to be repaired for several years now, so will try a light bulb.

I might also try using the modern replacement (IC on heatsink) . I believe it provides a steady 8VDC instead of the pulse. It's also cheaper.

Pete

 -------------- Original message ----------------------
From: "Graeme" <graemes at internode.on.net>
>  "My voltage regulator pulses when I did this test, but it's pulsing up to
> 22VDC. Dunno how it's doing that with a 14.4VDC source. Perhaps the digital
> multimeter cannot compensate quick enough for the pulses - perhaps not.
> 
> Does this mean the gauge VR is failing?
> 
> Pete"
> 
> You either need to use an ANALOGUE meter or a simple 12V D.C. test lamp to
> observe the operation.
> The pulsing is the good news though.