Instrument panel Volt Reg

[Cody Forbes]

I suspect that you have two unrelated things you are checking. What is the battery voltage with the engine running? 

On a 5000 the instrument cluster lights go out if you have a license plate bulb out; they ran the ground through those bulbs. Get out your Bentley wiring diagram and check for power and ground on the connectors for the cluster lighting.

-Cody Forbes (mobile)

On Oct 26, 2013, at 8:46 PM, "al" <streichea001 at hawaii.rr.com> wrote:

> Car: 1990 80 2.0 L
> 
> Problem: Lost instrument lights
> 
> Checked battery – 12.65 V
> 
> Checked fuse – OK
> 
> Pulled instr. panel
> 
> Checked rheostat,  registered 0.0-20.5 ohms  looks good to me.
> 
> Checked Voltage regulator, leads 1 – 2(Gnd), 11.75 V, should be battery voltage (12.65 V). I wonder why this reading is low.
> 
> Checked VR output , leads 3 –2 (Gnd), 10.00 V should be 9.50 – 10.50 V
> 
> I am going to start tracing the wiring.
> 
> Any ideas? 
> 
> Aloha.
> Al
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