PureFlow AirDog FP-150 - Dodge Cummins 1994-1998 - Manual (Page 22)

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NOTE: The power supply leads can be connected to the battery or the alternator. Connecting
the power supply leads to the alternator instead of the battery will create a corrosion free
connection.
Black (-) Red (+) Replace the Protective Cover
Figure 62 Figure 63
6-4A. Route the Red & Black power supply leads to the alternator Connect the Black (-)lead
to the alternator Chassis Ground connection. Connect the Red (+) lead to the alternator
Hot Lead going to the battery.
6-4B. Should you choose to connect the power supply leads directly to the battery,
connect the RED (+) lead to the POSITIVE (+) post of the driver's side battery.
Connect the BLACK (-) lead to the NEGATIVE (-) post of the same battery.
Black (-) Red (+)
Figure 64