Howdy. So when I bought the Suburban (1987 if it matters), the PO mentioned that he sometimes had issues with the glow plug light not turning on, but so far I hadn't had any issues until today. Basically I turn the key on, all other lights come on, but no glow plug light. Tried to turn it on/off a couple times, tried to crank for a few seconds, but nothing. So I look under the hood and realize that more of the wiring had been hacked up than I originally realized. Anyone got any tips on where to start looking/tracing things? Any pics of what it's supposed to look like at the controller? I tried wiggling wires but nothing obviously wrong. All tips appreciated.