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

 

think I have one ill look in the garage tomorrow

 

From here seems to match your colours half way down;
https://www.rhocar.org/index.php?/fo...a-dash-clocks/

Colour Panel Harness

1 Blue / White Main Beam

2 Black / Yellow +12v from IGN switch

3 Brown / Green Oil Pressure Pressure Switch

4 Black / White Indicators Indicator Switch

5 Green Tachometer Coil (Green)

6 Brown / White Temp Gauge Sender

7 Brown / Black Fuel Gauge Sender

8 Black / Green Indicators Indicator Switch

9 Brown / Yellow Brake Warning Reservoir Plug

10 Blue Alternator Warning Alternator Plug

11 Brown Earth Drivers Kick Panel

12 Green / Slate Illumination Panel Rheostat



#1 as per Haynes manual = Main Beam Warning



1 to 12 (Right to Left) Viewed from rear of Panel

 

Thankyou both for your replys that seems to be the info im after ill wire it up and give it a go would a sierra of this year have an eml as I thought it would being a efi shell thanks matt