Re: 72 Cheyenne Super Plain Jane
A minor update on this truck, yes I am still tinkering with her. I guess its true, you are never really done haha.
So first thing, I have been banging my head against the wall over a slow battery drain since I built this thing. About a month ago I was sick and tired of charging my battery and worrying about it draining when I drove it somewhere and parked it so I blew the interior apart and pulled out the multimeter to track this thing down. Initially I discovered that the alternator was contributing to the issue so I unplugged it (dropping it off at the rebuild shop today). After unplugging it I still had a .005 amp draw on the battery. I started unplugging fuses and discovered that pulling the cluster feed fuse eliminated the problem. After discovering that I had even more questions haha. I found that the cluster feed fuse is supposed to be a key on circuit but was getting power all the time. My first thought was the ignition switch crapped the bed and was letting power leach over. I swapped out the switch and the problem remained. After noticing a handful of sketchy wires on my factory harness I decided I needed to swap out my entire under dash harness with a good donor my dad donated about a year ago. I went through the new harness with a fine toothed comb, cleaned the crap out of everything, and put it all back together. After I installed the new harness I discovered the fuse was now switched properly with the ignition switch but I was still drawing power from somewhere... UGHH. Soo next I pulled out the instrument cluster and the draw went away. I started blanking off gauges and testing the draw and discovered that my temp gauge is getting power all the time causing my problem. I think the issue is coming from my printed circuit, I have 2 or 3 areas where the flat copper wire is not perfect and I think it may be leaching power between some of the hot wires on the circuit to the temp gauge. I am going to swap out my cluster with a known working cluster (from the jimmy) tonight and see if that makes all my problems go away. FINGERS CROSSED
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