Alternator regulation voltage test schematic and procedure for 454.0 model with engines 122.9, 134.9, 135.9, 639.9.

Wiring diagram showing multimeter, battery, alternator, starter connections and test procedure steps 1-9.

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See all Electrical figures for the Fortwo / Forfour (453), or browse the full figure library. Part numbers and callouts are community-sourced and cross-referenced against the manuals — confirm with your VIN before ordering.