extra fuel gauge

[Lawrence C Leung]

The parallel gauges will reduce the resistance of gauge pair, which will
result in higher overall voltages at the gauges. It may be possible to
add an in line resistor in series with the gauge pair to restore the
ratio, but I'd have to know more about the resistance of the gauges to
really be able to help. I am assuming the current draw for the gauges is
negligible, which means the resistance is very high, which means that the
overall effect of the parallel gauge may not be much. But without the
numbers, can't more than that. 

LL - NY

On Tue, 06 Mar 2001 22:37:24 -0800 Huw Powell <audi at mediaone.net> writes:
>
>> In my continuing quest to slowly convert my quattro to a rally car, 
>i'd like to
>> add a second fuel gauge...one right in front of my navigator.
>
>> Anyways, can I just 'tap' into the two wires that power the original 
>fuel
>> gauge, or will this screw up the reading on both? ideally, it would 
>be great if
>> I could just run two wires behind the dash to the original fuel 
>gauge...
>
>doesn't sound as good as at first might seem.  As i recall the fuel
>gauge (and coolant temp) circuits "start" at the inst cluster with a 
>10
>volt regulator (to keep them consistent), then the current flows thru
>the gauge, thru the wiring, and is grounded thru the sender.
>
>so two guages in parallel will probably screw up the voltage divider
>created by the resisitance of the gauge and the sender, and using two
>regs and two gauges into one sender will also.  Still, there might be 
>a
>way...
>
>-- 
>Huw Powell
>
>http://www.humanspeakers.com/audi/
>
>http://www.humanthoughts.org/