UNIVERSAL ATOMIC DIESEL SERVICE MANUAL PDF fileThis copy of the Universal Motors Service Manual has been re-created using images Glow Plug 17 – 18 Wiring Diagram 19 Reference Charts 20 – 2 (1) Specifications A glow-plug s employed to preheat the fuel for easy starts down to 50F (-150C). PEUGEOT ALL MODELS WIRING DIAGRAMS - GENERAL Wiring diagram. Installation diagram. 2 - CONSTITUTION OF THE DIAGRAMS: Schematic diagram: supplies ( + and -) components (with references, function symbols and internal electro-mechanical details, except for electronics) connector sockets on components earth points wire lines (with reference) Wiring diagram: supplies (+ and -)