MANUAL SITEMA ELECTRICO JEEP Cheroki

I am having problems with a Cheroki 2000 2.5 TD.
The engine is sometimes stop marking all the instruments and the witnesses of the ABS, Chek, Airbag and others light, once the voltimeter marks excess load but does not have on alternator load.
If someone has a manual of this vehicle or electrical circuit, I would appreciate it.
Thank you all.