96 Silverado dump truck. dual tanks. as the primary tank uses fuel the secondary tank pumps into primary tank. on the driver side frame rail is a relay to run the secondary tank fuel pump. just below that is the balance module. when i bought my truck, they eliminated the secondary tank. So, there's no working fuel gauge. if i hook the purple wire (output to gauge) to the blue with white tracer (signal wire primary sending unit) together and plug it back in? instead of an average, will the gauge give me an accurate reading?