hi i have a 1988 sierra estate 2.0 pinto efi ghia shell im just wondering if anyone has a pinout or by colour what each wire does on the back of the speedo clocks iv already found battery light and oil pressure light by following from the bulb holder but i now need to know wires for rev counter and coolant temp i also need engine management light but noticed the clocks arnt fitted with one is it in the center usually by where the fuel light is tia matt