The vehicle electrical system is single-wire, rated voltage 12 V; negative terminals of current sources are connected to the body (“vehicle ground”)
Scheme of electrical equipment ZIL - 131 is shown in fig. 1.
ZIL-131 electrical diagram color
To dismantle the power unit, it is recommended to install the bus on an inspection pit, above which there is a lifting device
Turn off the ignition and disconnect the engine control system wiring harness block from the coil