When I bought my Bronco a couple months ago, it had a three gauge sun pro aftermarket gauge kit installed under dash. The OEM fuel gauge read very low; the oil and temp. gauges did not work at all and had been disconnected. I was determined to get all the original dash components working. I replaced the sending units and connected the wires to find that the oil gauge read a little low, the temperature gauge read very low, and the fuel gauge still read very low. After reading a number of posts, I ordered an instrument voltage regulator from JBG. This piece is also known as a constant voltage regulator. It arrived today, and it fixed all my low gauge readings.
I noticed some odd behavior I have seen come up in other threads, like when the ground is poor, the instrument cluster does funny things. The turn signal lights stay on dimly, the gauges slowly peg, and drop all the way down very slowly. Anyway, I thought I would mention it in case anyone is seeing similar behavior. - Thanks
